Question

Find the ratio of $30$ minutes to $1.5$ hours.

Answer 1

Step 1: Express the bigger quantity in terms of the smaller quantity:

$1.5$ hours is bigger than $30$ minutes

$1$ hour $=60$ minutes

$\therefore 1.5$ hours $=60\times 1.5=90$ minutes

Step 2: Find their ratio:

The ratio of $30$ minutes to $1.5$ hours is,

$$\begin{gathered} 30:90 \\ =1:3 \end{gathered}$$

Therefore, the ratio of $30$ minutes to $1.5$ hours is $1:3$.