Question

out of 40 students in billy's class, 18 are girls. what percent of the students are boys?

Answer 1

First, how many boys are in the Billy's class room? We know there are a total of 40 students and 18 girls. That means 22 are boys because 40 - 18 = 22.

The 40 students represents 100% of the class room.

$\frac{40}{40}$ = 1
To convert into a percentage, multiply by 100.

1 * 100 = 100%

We can use the same reasoning to get the percentage of the boys.

$\frac{22}{40}$ = 0.55

Multiply by 100.

0.55 * 100 = 55%

So, 55% of the students are boys.