Math question: 32 is 40% of what number?

Question

Hey guys. It's been 7 years since I was in high school and I'm reviewing for a math test I have to take.

32 is 40% of what number? The answer is as important as explaining how it was figured out. What's the formula?

Answer 1

I just kept guessing - 32 is 40% of the number 80.

80 x .4 = 32

Answer 2

Hi

The formula to figure these problems out is is over of equals percent over hundred

so the formula is 32 with x underneath it and 40 under 100

so then its just a porportion

multiply the side withou the x divid with the x number

to check ur answer u can just divide both fractions and they should be the same

                          

Answer 3

the equation would be .4x=32

In order to solve it you need to divide 32 by .4 which equals 80

You can test it by taking 80 times 40% or .4 which will come to 32.

The way I thought in my mind how to come up with the equation was 40 percent of an unknown number equals 32.

Answer 4

Eighty

Divide 32 by 40 for the answer, .8

If A is C% of B,  A/C=B

Answer 5

Its 80

32/????=40/100

U need to cross multiply to find the anwser

so . . .

32*100=3200

then divide by 40

3200/40=80

Answer 6

alright

32            40

over   =    over

x            100

cross mulitiply and divide

and you will qet ur answer.

the x is there because that the quantity you want to figure out.

32 is on top because thats the given amount.

40 over 100 because 40% is the same as 40 divided by 100

Answer 7

32 is 40% of 80. The way you solve this is a proportion, with X as the number you want to find. It looks like this on paper.

32=40%

X   100%        

I can't correctly draw it using a keyboard, but there should be a division line between 32 and x, and 40% and 100%.The = sign should be directly in between the 4 numbers. The idea behind using the proportion is 32 is 40% of X, and X is 100%. By cross multiplying (32*100 and 40*X), you are left with the algebraic expression: 40x=3200. You divide the 40 from both sides, leaving X by itself, and you come to X=80. To check to make sure your answer is correct, you can multiply 80 by .4, or 40%, and you will come back to 32.

There are other ways to do this type of problem, but the algebraic method is the most reliable on more difficult problems of this nature.

  

Answer 8

32/.8 = 80

that is the proper way

Answer 9

80

80 * (.4) = 32

Formula:

x * (.4) = 32

x = 32/(.4)

Answer 10

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