Question

Find the ratio of $30cm$ is to $1.5m$

Answer 1

Ratio can only be found of quantities of same units.

We know that ,

$1m=100cm$

$1.5m=150cm$

Required ratio $=\frac{30}{150}$

$$\begin{gathered} =\frac{1}{5} \\ =1:5 \end{gathered}$$

Hence, required ratio is $1:5$