How do you find the percent of a number?

Question

Like if you can do an example for me... one of them is Find 135% of 400. Thanks :)

Answer 1

how i was taught it

ok

put the percent you want over a hundred

135/100

because 100%

then = (in this case) x over 400

135/100 = x/400

then cross multiply

400 times 135 = 54000

then divide by 100

54000 divided by 100 = 540

and that works  and if there is a problem that says 40 is What percent of 400 then you would set it up like this

x/100 = 40/400

then cross multiply then divide by the number across from x  

or another one like 55 is 75% of What number u would set it up like this

75/100 = 55/x

cross multiply 55 and 100

5500

then divide by 75

and what ever number that is

and unless otherwise stated the percentage side always always always has 100

it doesn't matter which side the 100 goes on

as long as its on the bottom and

as long as the numbers match up

like the percent number has to go over the 100

and the regular number has to go over the other regular number

if you need any help with understanding this then email me

Answer 2

400x1.35 = 540

so

135% of 400 is 540

:]

Answer 3

The easiest way for me is to turn the percent into a decimal.

So for 135%, the decimal is 1.35

multiply 1.35x400 and your percent is 540!  

Answer 4

You multipy the number by the percentage as a decimal.  So 135% as a decimal is 1.35, and 1.35 x 400 = 540.