Question

Simplify.

$\frac{7}{-18}\times \frac{4}{21}$

Answer 1

First , we write the rational number in their standard form.

$\frac{7}{-18}\times \frac{-1}{-1}=\frac{-7}{18}$

$\therefore \frac{7}{-18}\times \frac{4}{21}=\frac{-7}{18}\times \frac{4}{21}=\frac{-7\times 4}{18\times 21}=\frac{-1\times 2}{9\times 3}=\frac{-2}{27}$

Hence , $\frac{7}{-18}\times \frac{4}{21}=\frac{-2}{27}.$