# 1. Classify the following numbers as rational or irrational:(iii)     $\frac{2\sqrt{7}}{7\sqrt{7}}$

Given number is   $\frac{2\sqrt{7}}{7\sqrt{7}}$
$\Rightarrow \frac{2\sqrt{7}}{7\sqrt{7}} = \frac{2}{7}$
As we can clearly see that it can be represented in  $\dpi{80} \frac{p}{q}$  form. Therefore, it is a rational number.