Answer
$-\frac{2}{3}$
Work Step by Step
The opposite of a number $a$ is the number on the other side of the number line that is equal distance from 0 as $a$ is. We can find the opposite of a number by writing a negative sign in front of the number.
$-(\frac{2}{3})=-\frac{2}{3}$
Therefore, the opposite of $\frac{2}{3}$ is $-\frac{2}{3}$.