If there are 45 students and 40% are girls how many are boys?

How do I know what numbers to use and how do I set up to solve.

1 Answer
Apr 17, 2018

27 boys.

Explanation:

"Number of student"s = 45

"Number of girls" = (40/100 * 45) = "18 girls"

"Number of boys" = "Total Number of students" - "Number of Girls"

= 45 - 18 = "27 boys"