How to work out percentages of whole numbers

[kassandraloves2sing1]

An easier way to do this is using a proportions

For example: 22 is what percent of 55?

22 = x

55 100

22 x 100= 55x

2200 divided by 55 equals 40 so its 40%

[LifeAsAnExtra]

God.. I wish I had a British accent. They're so fancy

[Munfar1]

TROLOLOLOLOLOLLLLLLLLLLLLLLLLL­LL



[AngelChaeng]

I don`t really understand this question, could you help me find the answer ? And could you explain what you had to do to find the answer?

what is : 50% of 70?

[MrMGD92]

@gummybearbrogan-then you can work out 33% or 15% or whatever you want by (so for 15% for example)you would get 1% of a number then add that 5 times to get 5% then add 10% and 5% together and you would get 15%.(i am not that good at maths i just learned this way i thought it might help)i don,t know the rules and stuff of adding numbers with decimals.so i,m not good at that yet.good luck!

[gummybearbrogan]

@MrMGD92 yes thankyhuu for replying to my question which i posted like 3 months ago... your very quick!!! haha not :L

[MrMGD92]

@gummybearbrogan why are you being a prick? i was just trying to help and i only seen your comment today.it dosen,t matter if you posted it yesterday or 2 years ago i was just trying to help you.

[XxXloOolyXxX]

u r the best thanks so much

for the video

[scar12x9]

this really halped alot, thanks, its just that i have trouble visually learning in class and the textbooks dont help much :)

[gummybearbrogan]

Could you please explain an easier one for me, because I use 10%, 20, 30 , 40 , 50 , 60 , 70 , 80 , 90 , 25 and 75. I'm 11 and kind of struggle with this.

[Brainframeable]

@gummybearbrogan Hi - this is a little tricky to answer as the examples I've used might take a while to work through. Let's say you want to work out 60% of 90. If you know 10% is 9 - then 60% is 6 lots of 9 - or 6 x 9 - the answer is 54.

The method I've used is for any number but using the "10% x a bit" can sometimes work really well. Hope this helps!

[gummybearbrogan]

@Brainframeable Thankyou, it does! So, if you have two whole numbers like the example you said, 60% of 90. Could you just automatically take the 6 and the 9 and just times them. =54

Thankyou

[Brainframeable]

@gummybearbrogan hi..hmmm...you could but it's better to work out 10% then multiply. Lets say the number is 112 and you want to find out 70%. Work out 10% - that's 11.2. Then 7 lots of 11.2 which is 78.4. So 70% of 112 is 78.4.

Well done for thinking it through - it's good to see you're having a go.

[MrMGD92]

@gummybearbrogan Hi to get 10% of a number you move the decimal point one over so for 90 the decimal point is arfter the 0 because the number is 90 so if u move one in you get 9 to get 1% of a number you divide the 10% number by 10 again so you know that 10% of 90 is 9 so to get 1% you divide 9 by 10 which is 0.9 so you know that 1% of 90 is 0.9.then you can work out 2% by adding 1% +1%(thats 0.9+0.9)then to get 3% you do 1%+1%+1%.

[isreal95]

best video of how to do this ive seen so far

[ghfd99]

thankyou, i wouldnt bother going to school because i learn more on cpu lol

[stealthvsion]

Or... you could just multiply .12 x 50.

[Brainframeable]

Hi ... you could .... but this involves long multiplication and a decimal conversion at the end. It will work and can be a good idea if you prefer. There are a number of ways of working out percentages - the important thing is to practice and stick with the same method each time. Thanks for your comment.

[9SuperMonkeyBall0]

@Brainframeable I'm 34, and when I was 12, I started learning %, struggling with it, and did test taking with my math teacher with precentages, and other math subjects, and it was funny when I asked hoe much dirt is in a hole 3ft by 6ft by 6ft, and she said 108ft, and 100% of 108, and I said to her no, there's no dirt it's a hole.

[9SuperMonkeyBall0]

@Brainframeable I'm 34, and when I was 12, I started learning %, struggling with it, and did test taking with my math teacher with precentages, and other math subjects, and it was funny when I asked hoe much dirt is in a hole 3ft by 6ft by 6ft, and she said 108ft, and 100% of 108 is 108, and I said to her no, there's no dirt it's a hole.

[speedcannon69]

hi, great work i must say and very clear explanation. but i have a question. on the first Q. u started by dividing 100 to 50. then on the second Q. u divided the 100 to 15. My Q is that do u always have to select the highest number first to divide to 100 when doing percentages?

thanks

[Brainframeable]

Hi - thanks for the question. The main aim of reducing is to make everything smaller and therefore easier to multiply. Providing you always divide both the top and bottom by the same number it'll always work. You're not really changing anything as 15/100 is exactly the same as 3/20. It just makes the sums a little easier. Hope this helps!

[TheChris11383]

Very helpful for my homework