Classify the following numbers as rational or irrational.
$\frac{2 \sqrt{7}}{7 \sqrt{7}}$

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Solution

$\frac{2 \sqrt{7}}{7 \sqrt{7}}$
$= \frac{2}{7}$
Can be written as $\frac{p}{q}$ as rational number $\frac{2}{7}$
So $\frac{2}{7}$ is a rational number

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