Question

In a class, there are $25$ boys and $20$ girls. Find the ratio in the simplest form of girls to total students.

Answer 1

Given:
Number of boys = $25$
Number of girls = $20$
Total students = no. of boys + no. of girls
$$\begin{gathered} =20+25 \\ =45 \end{gathered}$$

The ratio of number of girls to total students = $\frac{20}{45}=\frac{5\times 4}{5\times 9}=\frac{4}{9}$
$4\mathrm{and}9$ have no common factors other than $1$
So, the simplest form of the ratio is $4:9.$