Question

In a class of $40$ students, $25$ are girls and the remaining are boys. Find the ratio of total students to girls.

Answer 1

Total number of students = $40$
Number of girls = $25$
The ratio of total students to girls = $\frac{40}{25}$ = $\frac{5\times 8}{5\times 5}=\frac{8}{5}$
$8\mathrm{and}5$ have no common factor other than $1$
So, the ratio of total students to girls is $8:5$.