Question

The ratio of girls to students at a middle school is 10 to 18. If there are 270 students at the school, how many are girls?

Answer 1

The ratio of girls to students at a middle school is 10 to 18

`\frac{\text{girls}}{\text{students}}=(10)/(18)`

If there are 270 students at the school, how many are girls?

Let x be the number of girls.

Then we can set up the following proportion

`(10)/(18)=(x)/(270)`

Let us solve for x

`\begin{gathered} (10)/(18)=(x)/(270) \\ x=(10)/(18)\cdot270 \\ x=150 \end{gathered}`

Therefore, there are 150 girls.