Write the following ratios in lowest form:
$40 : 15$ ________

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Solution

To get lowest form of ratio $40 : 15$ which can also be written as $\frac{40}{15}$
Divide both numerator and denominator by HCF of $40$ and $15$ which equals to $5$ .
$\Rightarrow \frac{40}{15} = \frac{\frac{40}{5}}{\frac{15}{5}} = \frac{8}{3}$
Hence, lowest form of ratio $40 : 15$ is $8 : 3$

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