Growing by a percentage | Linear equations | Algebra I | Khan Academy

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  • Опубликовано: 13 дек 2024

Комментарии • 116

  • @fernandojsoto2375
    @fernandojsoto2375 10 лет назад +16

    Or instead of doing the percentage and then adding the original number, when GROWING, you can simply add +1 to your percentage, then solve and you'll get the same answer, without having to add the original number again.

    • @fernandojsoto2375
      @fernandojsoto2375 9 лет назад +6

      I'm sorry for being late, but basically if you are growing (or increasing, such as taxing) you can simply add 1 to your decimal, and what this does is multiply your value, plus the percentile increase; instead of adding your value then the percentile

    • @shaunceyy1851
      @shaunceyy1851 6 лет назад +3

      so basically intead of 95+0.15x95 we can do 95(1.15)

    • @numbersletters2920
      @numbersletters2920 5 лет назад +1

      A➗b=c A ^B=

  • @prashanthidhandapani
    @prashanthidhandapani 6 лет назад +6

    In the last problem,
    Portfolio grows by 25% and the current value is $100
    We need to find the initial value x
    Which means 125% of x = 100
    I.e 1.25*x=100
    X= 100/ 1.25
    X= 10000/ 125
    X= 80

  • @TheDeathofGrace
    @TheDeathofGrace 16 лет назад +8

    so amazing the instinct we have when we make a mistake.

  • @TheTCOLL
    @TheTCOLL 6 лет назад +5

    I think whats a bigger problem is percentages in the thousands. For example:
    From 2000, to 25,00 is 1150%. If I divide this by 28 I get approx. 41% a year.
    If I take 2000 and do a future value calculator (excel) with 41% a year, I get over 30,000,000. What am I doing wrong? How do I find what percentage growth this is per year.
    I do not get it.

  • @canberkhercan8907
    @canberkhercan8907 3 года назад +1

    6:54 diamond hands

  • @satisfiction
    @satisfiction 8 лет назад +5

    I always preferred doing 95x1.15

  • @karolinaambroziak4688
    @karolinaambroziak4688 7 лет назад +4

    Amazing! Thank you so much for your videos. It turns out that maths is not that difficult if someone explains it properly.

  • @konopong
    @konopong 15 лет назад +1

    For the second problem, since 1.25 = 5/4, you can divide by 5/4 ( multiply by the inverse, 4/5) which gives you 80 without having to do long division.

    • @VashaInigo
      @VashaInigo 2 года назад

      your in the future now lol

  • @fabianriquetti8498
    @fabianriquetti8498 8 лет назад +11

    100% = 95
    15% is x 95x15/100=14.5 this way is easier

    • @sovereigngeniusmusicmyster2230
      @sovereigngeniusmusicmyster2230 7 лет назад +2

      fabian riquetti 6 _15 10? =195 15 30 45 60 75 90 5 17.2/3 how doed it lead to 14.5

    • @shurjoaunibar
      @shurjoaunibar 5 лет назад

      For many reasons he didn't put that 'cuz we're doing it for (maybe) the first time

    • @my_studies2888
      @my_studies2888 5 лет назад

      fabian riquetti Or 95:100x15..

  • @kosssalah4030
    @kosssalah4030 7 лет назад +15

    I can't belive this video was made when I was 8

  • @thulaxshykanthaverl7328
    @thulaxshykanthaverl7328 7 лет назад +3

    This is how i do the second one.
    If you have $100 after the number has grown with 25%
    $100 is 125% of the original number
    The original number is 100%.
    To find the original number you just have to divide $100 (which is the number you have after it has grown with 25%) with 125 and then you know what 1% is and times that by 100 to find the original number(100%).
    I'm bad at explaining so I'll show you my calculations:
    100/125= 0.08
    0.08*100= 80

  • @myfolder5388
    @myfolder5388 5 лет назад +6

    Literally just do .15*95 and then add the sun of that and 95 together that's the easiest way, just like he does in the video

    • @darkrunes8749
      @darkrunes8749 4 года назад +2

      2020 here just checkin up on u

    • @myfolder5388
      @myfolder5388 4 года назад +1

      @@darkrunes8749 i have no idea why i commented that 😭

    • @TheMaiham
      @TheMaiham Год назад

      @@myfolder5388 2023 here just checkin up on u

  • @Roman-wm4ji
    @Roman-wm4ji 5 лет назад +2

    Thank you Mr. Sal!!

  • @crontsquared230
    @crontsquared230 9 лет назад +8

    What's a portfolio?

    • @finn3588
      @finn3588 8 лет назад +7

      It's where someone invests in a stock and and their portfolio is how much money they make and what stocks they invest in

    • @FinanceLogic
      @FinanceLogic 7 лет назад +3

      In art your portfolio would be a group of your works, like 5 paintings or all your paintings. And in investing, your portfolio is a group of your stocks or houses or cryptocurrencies or whatever you're investing in. Sometimes that's all your stocks or all your stocks of a certain type or all your stocks you bought using one broker to buy them etc. Really however you want to measure it.

  • @3888799
    @3888799 13 лет назад

    @MrMGD92 because the questions says "it grows" which is addition. for example a crowd of 2 people grows by 5 people is the same as 2+5, so back to the problem once you find the percent you still have to add t to the whole number $95

  • @djmauropicotto
    @djmauropicotto 15 лет назад +1

    just divide 28/63 and it should give 0.44 which is 44%

  • @synon9m
    @synon9m 11 лет назад

    would've been better if the demo also showed that if x + 0.15x = y, then 1.15x=y, which means you can find out how much something grows by 15% multiplying by 1.15, in one step.

  • @user-sk8zx3kw1i
    @user-sk8zx3kw1i 4 года назад +1

    I can’t believe this video was made when I wasn’t even born

  • @bofa140
    @bofa140 4 года назад

    has anyone realized how much sal's hand writing has gotten better over the years

    • @IammeoramI
      @IammeoramI 4 года назад +2

      Yeah, sometimes when I'm watching these I'm like ugh, "Sals doin a long lecture today"
      Then the I see the potato quality and sloppy handwriting then I'm like "Lmao old Sal video from when he didn't know how to cut, copy, paste or select all"

  • @idster7
    @idster7 15 лет назад

    @demilo1625 looks like 44.44%. just let 28/63=x/100 and cross multiply. 28/63 is the fraction you have, and some number over 100 is the fraction you want.

  • @LifeAndStories89
    @LifeAndStories89 2 года назад

    That's very interesting. I appreciate it!

  • @tomsimard206
    @tomsimard206 9 лет назад +2

    Great job!

  • @tmbr10t60
    @tmbr10t60 4 года назад +1

    This vid was made when I wasn't even born yet 😂😂😂

  • @nocturnalvisionmusic
    @nocturnalvisionmusic Год назад

    Weird chalkboard like noise at 3:40 😮

  • @muhidul
    @muhidul 12 лет назад

    Thank you, very helpful video

  • @karifurai8479
    @karifurai8479 6 лет назад +2

    lol 11 years ago but he still has the same mic

  • @jerfersonmatos28
    @jerfersonmatos28 7 лет назад +2

    What is a port folio?

  • @bolinwang8603
    @bolinwang8603 8 лет назад

    thanks, excellent explanations!

  • @dainonearl2391
    @dainonearl2391 8 лет назад

    Can you post videos about investment strategies?

  • @user-69699
    @user-69699 Год назад

    Haters say the he didn't define by how much time he grows at the rate of 15% and just finds out how much he has in some unknown time

  • @Jayhawkblue
    @Jayhawkblue 15 лет назад

    great teacher

  • @ktt1977
    @ktt1977 13 лет назад

    Thank you!

  • @Seodotcom
    @Seodotcom 13 лет назад

    Great info thx

  • @Ghost572
    @Ghost572 11 лет назад

    on the excerises with the website I learned that because it comes in handy when its like 50 pounds increased by 125% so £50 (100%) + 125% = 50 * 2.25%

  • @egyptroxs
    @egyptroxs 14 лет назад +1

    GENIUS

  • @AMFKalakal
    @AMFKalakal 14 лет назад

    thank you

  • @carjaune6793
    @carjaune6793 3 года назад

    "25% is roughly one fourth, right?" interesting quote

  • @bobstone4672
    @bobstone4672 Год назад

    I never knew you work in finance, i thought you were either a scientist, doctor or engineer

  • @abdurrazaq3657
    @abdurrazaq3657 3 года назад

    Sir solve the problem...if 500 is reduced by 25% what is the new value
    .???

  • @sadhinal-mamun8340
    @sadhinal-mamun8340 7 лет назад

    Very nice system

  • @xc_astro2310
    @xc_astro2310 6 лет назад +3

    You know it would be a lot easier to just use fractions..

  • @idster7
    @idster7 15 лет назад

    @vickiormindyb that would cause a run up of inflation.

  • @devikaishigami5019
    @devikaishigami5019 4 года назад +2

    Here’s your 2020 comment.

    • @yujinkim808
      @yujinkim808 4 года назад

      Im in 2021😲😲😲😲😈

  • @uphill248
    @uphill248 14 лет назад

    @vickiormindyb OK THANK YOU AGAIN.

  • @16yearoldwhiteboy
    @16yearoldwhiteboy 12 лет назад

    Thanks (:

  • @Prime_NotFound
    @Prime_NotFound 8 месяцев назад

    im here watching from 2024, time go's so fast...

  • @mannyislikethat
    @mannyislikethat 3 года назад

    Haha. Video came out before I was born KEWK

  • @30772muneeb
    @30772muneeb 9 лет назад

    nice.nice,very nice

  • @TheAnimatedAlien
    @TheAnimatedAlien 13 лет назад +2

    Does something make a laughing sound at 3:40 ?

  • @unknownali5169
    @unknownali5169 4 года назад +1

    Niga

  • @TheClarko1234
    @TheClarko1234 12 лет назад

    7:10 haha "I just realised you probably dont know what a hedge fund is.........I invest in stocks for living"....and probably have several yachts :p Thanks for vid!

  • @teakhydra
    @teakhydra 4 года назад

    2:35 i dont follow how you getting the numbers

  • @carlosmarrufo2350
    @carlosmarrufo2350 9 лет назад +3

    13 is what percent of 47?

    • @duchesssarena4979
      @duchesssarena4979 9 лет назад +6

      Carlos Marrufo yo mama

    • @duchesssarena4979
      @duchesssarena4979 9 лет назад +6

      Carlos Marrufo sorry i couldn't resist the urge

    • @mooz2x
      @mooz2x 9 лет назад +2

      +Duchess Sarena that was horrible

    • @blazecorn9516
      @blazecorn9516 9 лет назад +1

      +Hamza Mohamed Horrible indeed, to be honest it didn't make any sense at all because if someone says " 13 is what percent of 47? then you say "yo mama" it would not be an answer for this question, this is not about the persons' mother.

    • @mooz2x
      @mooz2x 9 лет назад

      Blazecorn it was unnecessary

  • @sharonlee7325
    @sharonlee7325 4 года назад

    thanks?

  • @demilo1625
    @demilo1625 15 лет назад

    Mr. Hernandez had to interview a total of 63
    households in his assignment. He has already
    finished 28. What percentage of the households
    in his assignments has he finished? (Round
    your answer to the nearest tenth of a percent.)Help me

    • @SamiAbbasRainbowBros
      @SamiAbbasRainbowBros 5 лет назад

      I know this question is 9 Years old, but I got u. Mr Hernandez has interviewed 28/63 which is 0.44, which in percentage form is 44%

  • @uphill248
    @uphill248 14 лет назад

    @vickiormindyb Hey, thank you very much I was doing it right. I just wasn't sure. Thank you again. Bye

  • @kazihossainrubel1352
    @kazihossainrubel1352 4 года назад

    👇👇👇

  • @brandonwiesen2658
    @brandonwiesen2658 7 лет назад +1

    how is 1.25x the answer to 1x + .25x ?

    • @AN-xj9je
      @AN-xj9je 7 лет назад +1

      Brandon Wiesen
      1+1/4= 4/4 +1/4= 5/4 or 1.25

  • @totally_joey6124
    @totally_joey6124 2 года назад

    I did have a doubt why did u write 95+.15%??

  • @uphill248
    @uphill248 14 лет назад

    @vickiormindyb THANK YOU FOR REPLAYING. BUT WHAT IS THE FORMELA FOR THIS PROBLEM? My credit card GIVE ME A 2% CASH BACK ON PURCHEASES I MAKE. I JUST WANT TO SEE IF THERE RIGHT. AND I WANT TO BE ABLE TO DO IT TOO. THANK YOU.

  • @ashalovee
    @ashalovee 5 лет назад

    this was made 1 month before I was born loooooooool

  • @bofa140
    @bofa140 4 года назад

    This vid is older than me

  • @thet5805
    @thet5805 6 лет назад +2

    the screen is huge. lol on ur mistake

  • @HomieTheHomie
    @HomieTheHomie 7 лет назад

    This video is ollld

  • @uphill248
    @uphill248 14 лет назад

    this didnt help me. can someone help me please? if i get a 2% cash back on $19.40. how much am i getting back?

  • @nnyy10
    @nnyy10 13 лет назад

    My Teacher asked Me to watch this vid >.>

  • @ruthfatima8709
    @ruthfatima8709 2 года назад

    who is watching this in 2022

  • @jakeambrose4294
    @jakeambrose4294 7 лет назад

    that is to cool you work at a hedge fund i studied finance so long and passionately but never got a spot cuz im self educated on it. buy tesla and ripple coin

  • @bolinwang8603
    @bolinwang8603 8 лет назад

    g

  • @gigimarquez9065
    @gigimarquez9065 7 лет назад

    this was very confusing

  • @hackerofawesomeness
    @hackerofawesomeness 12 лет назад +1

    you heard of carrying the 1?

    • @gbrl10
      @gbrl10 6 лет назад +3

      Byte11 what?

  • @mahmoudkodi2859
    @mahmoudkodi2859 11 лет назад

    lol

  • @9SuperMonkeyBall0
    @9SuperMonkeyBall0 13 лет назад

    No offense, but it's 14.25.

  • @MoodyJupiter9
    @MoodyJupiter9 11 лет назад

    talk faster im not 4 years old