Question

the ratio of boys to girls at the beach cleanup was 7:8. If there were 42 boys, how many girls were there?

Answer 1

Let the no.of girls be 'x'

By Qn,
$\frac{42}{x} = \frac{7}{8} \\ \\ \frac{6}{x} = \frac{1}{8}$
ie
$x = 48$
Thus no.of girls=x=48