Question

Add the following rational numbers:
$\frac{9}{-13}and\frac{-11}{-13}$

Answer 1

To, add rational numbers their denominators should be same, so it will become common and numerators will be added to get answer.

As, their denominator is already same.

So,

$\frac{9}{-13}+\frac{-11}{-13}=\frac{9-11}{-13}=\frac{-2}{-13}=\frac{2}{13}$