Question

in a class of 32, 24 likes swiming .what percent of the class likes swimming ?

Answer 1

You should say: 
(24*100)/32 which is equal to 75% 

Have a wonderful day! 

Answer 2

percent means parts out of 100
x/100=x%

24/32=x/100
12/16=x/100
6/8=x/100
3/4=x/100
times 400 both sides
300=4x
divide both sides by 4
75=x

answer is 75%