Question

Which of the following ratio is equivalent to $15:45$?

• A. $1:3$
• B. $3:1$
• C. $30:45$
• D. $45:15$

Answer 1

The correct option is A

$1:3$

Ratio $15:45$ can also be written in fractions like $\frac{15}{45}$
$15$ and $45$ have HCF as $15$
$\frac{15\times 1}{15\times 3}$= $\frac{1}{3}$
So the equivalent ratio to $15:45$ is $1:3$.