Question

What is the sum of the rational numbers $\frac{2}{5}$ and $\frac{-3}{7}$?

• A. $-\frac{1}{35}$
• B. $0$
• C. $1$
• D. $\frac{1}{35}$

Answer 1

The correct option is A $-\frac{1}{35}$

$\frac{2}{5}+\frac{-3}{7}$
$\Rightarrow \frac{14-15}{35}\left[\text{LCM of 5 and 7 is 35}\right]$
$\Rightarrow \frac{-1}{35}$