if there are 28 students in a class and there are 13 girls, what percentage of the class is girls?

Answer 1

( 13 / 28 ) * 100 % = 0.4643 * 100 % = 46.43 %

Answer 2

13/28 x 100%
=46.4%(corr. to 3 sig. fig.)
(we usually correct to 3 significant figure if we see long decimals)