Express the given ratio in its lowest term: $28 : 21$

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Solution

Finding the lowest term of the ratio
To express the ratio in lowest form, we divide both terms by HCF of the terms.
Here, $H C F (28, 21) = 7$
So, dividing the ratio by $7$ , we get
$\Rightarrow 28 : 21 = \frac{28}{7} : \frac{21}{7} = 4 : 3$
Hence, lowest term of given ratio is $4 : 3$

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