Write the following ratios in lowest form:
$30 : 45$ ________

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Solution

To get lowest form of ratio $30 : 45$ which can also be written as $\frac{30}{45}$
Divide both numerator and denominator by HCF of $30$ and $45$ which equals to $15$ .
$\frac{30}{45} = \frac{\frac{30}{15}}{\frac{45}{15}} = \frac{2}{3}$
Hence, lowest form of ratio $30 : 45$ is $2 : 3$

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