Calculating Percents using Decimals - [6-3-17]
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- Опубликовано: 11 сен 2024
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Twitter: / jasongibsonmath
In this lesson, you will learn how to work with percentages using their decimal equivalents. In order to calculate the percentage of a number, we will first convert the percentage into a decimal, then we will use this decimal equivalent to multiply by the number. It is usually easier to use the decimal form of a percent to solve problems.
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I'm so thankful to have come across your page... You truly are a gifted teacher/instructor. I have a difficult time w/math and I can't believe I didn't fall asleep, like I usually do in other videos. I worked the problems with you and got them right each time, almost wanted to cry tears of joy!
This is briliant, your teaching methods makes the subject so interesting. Math was a nightmare for me, but now youve brought a lot of confidence. This is definitely a worthy investment for my kids. Thank you so much Jason.
Great to hear!
I'm about to take an entrance exam for mechanical engineering in university. Thank you for all your help and advice.
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This is how everything should be taught in all schools. Simple, fun and clear. They should learn from you, you are the best and made a big difference in my life, truly American teachers are the best too at teaching. But offcourse your ways of teaching makes it the 👌 best.
Beautifully written! Perfectly thought out! Yes. When will it happen?
THANKYOU SO MUCH, IVE BEEN STRUGGLING AND FINALLY GOT IT !!!
THANKYOU SO MUCH, IVE BEEN STRUGGLING AND FINALLY GOT IT
Hi Jason, question
1. Is Algebra 2 and college algebra the same thing?
2. Does your Chemistry course cover all high-school/ AP chemistry content?
3. Does your Physics 1/2 cover all of AP physics 1 and 2 content?
you are my teacher really thanks teacher
Welcome!
Your vids are amazing, i feel like you teach better then my teacher ._.
Bravissimi Prof
cant thank you enough! so glad that i found your channel.
Amazing teacher i love the way you teach
Very nice talking and good explaining, I find this fast learning.
great video sir
God bless you sir.
I was sitting in 5th grade (primary school) when this subject matter
hit me clearly between the eyes.
Me too, in 1968. Went right over my head, thus I've returned to class today. I now honestly feel if the teachers had told us we'd be able to calculate how much money we'd have in the bank after accumulating *APY* interest, I might have listened more. At least I did learn that : _If my Sears _*_Minibike_*_ had a full gas tank, I could ride to _*_Pasadena_*_ JPL, play all day and make it back home in style. If I'd tried that run with a 50% tankful of gas, there would have been a good chance I'd be walking my Minibike back home._ *Good* *Grief!*
I mean for kids to get practice is good but not practical in life, where you need quick answers in higher education, proficiency exams and real life, All these are just quick multiplication instead of just dragging with maths. All can be done in the head and tricks given below)
50% of 20 = 1/2 x 20 OR 5 x 2 =10
25% of 32 = 2 x 3.2 + (3.2/2) = 6.4 + 1.6 = 8.0
40% of 25 = 4 x 2.5 = 9.0
16% of 150 = 16 x 150% = 16 x 1.5 = 16 + 8 = 24
26% of 60 = 26 x 60% = 2.6 x 6 = 15.6
73% of 8 = 7.3 x 8 /10 = 58.4/10 = 5.84
75% of 72= 7 x 7.2 + (7.2/2) = 50.4 + 3.6= 54.0
90% of 37 = 9 x 3.7 = 33.3
Here some tricks
Both A & B are interchangeable
A x B% === B x A%
1)if either of the A, B is 25,50,100,..multipe so its either x1/4, x1/2, x1, x1.5, x2
45 x 50% = 22.5 , 45 x 100% = 90, 45 x 150%=112.5
2) easy formula
20 x 30% = take 10% of both A and B and Multiply
=2 x 3 = 6
3)find round number (to 10, 15) etc in A or B and use that as percentage
so 30 x 22% = 22 x 30% = 2.2 x 3 = 6.6
if one is multiple of 5, then use that as percentage and normal multiply(10%) + (5% = 1/2(half) of the 10%)
45 x 22% = 22 x 45% = 2.2 x 4 + 1.1(half of 2.2) = 8.8 + 1.1 = 9.9
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excellent percentage lesson using decimals, thanks for sharing
Thanks.
64 y old and still learning😊
That’s amazing 🎉
Great 👍
You really promoting me too I like the way you explain
Your Like A Wizard!
this will help me on grade 4
You print numbers very nearly. Nice.
In a group of 150 students, 40% are the girls. How many girls are there in the group?
Ans: 0.40×150=60.0 girls.
Late Comedian *Don* *Rickles* - _"Did you check the package?"_
Great sir great sir thank u.plz heart on my coment plz❤️
Give lumber help me learning math
good.
Being an Asian I feel this is very easy for me even easier for a 5th grader...
❤❤❤💪👍
25% of 32. 0.25 x 32. 2x5=10. 5x3+1=16. When you you to times by 2, you said drop a zero first off? Lost me.
Is it because before 0 is units, after decimal point is tens and two numbers to right of decimal point is hundreds? I'm sure this is the answer.
I love Math
Talking too fast
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