Question

A class has 32 pupils if 12 are boys what percent are girls

Answer 1

So 12 out of 32=12/32=6/16=3/8

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

3/8=0.375/1
0.375/1 times 100/100=37.5/100=37.5%

answer is 37.5%