Question

Which of the following pairs represent the same rational number?
$\frac{-7}{21}$ and $\frac{3}{9}$

Answer 1

$\frac{-7}{21}$ and $\frac{3}{9}$

$\frac{-7}{21}=\frac{-1}{3}$

$\frac{3}{9}=\frac{1}{3}$

Since

$\frac{-1}{3}\ne \frac{1}{3}$

So, $\frac{-7}{21}$ and $\frac{3}{9}$

does not represent same rational number.