Question

In a class of 30 students there are 18 girls. what is the ratio of boys to girls in the class.

Answer 1

Ratio:$girls:boys 18:12 divide both by 6 3:2$

Answer 2

18 girls ⇒ 30-18=12 boys

boys/girls = $\frac{12}{18}=\frac{2}{3}$