Question

Express the decimals in the from of $\frac{p}{q}$ :
$0.\overline{621}$

Answer 1

Let $y=0.\overline{621}...............\left(1\right)1000y=621.\overline{621}...............\left(2\right)$

Subtracting (1) from (2)

$999y=621\Rightarrow y=\frac{621}{999}$