Question

There are 80 students in a 8th grade, 20% are boys. How many boys are in 8th
grade?

Answer 1

16

Explanation:

`(20)/(100) x (x)/(80) =16`

or do

80 x 0.20=16

both works

Answer 2

16 boys

Explanation:

Lets go with easy example:

20% of 100 students means 20 students: what is done there

• We converted 20% to 20/100 so

`(20)/(100)*100=20`

Lets do the same with 80 students as well

`(20)/(100)*80=16`