Answer
$-\dfrac{3}{4}$
Work Step by Step
The number halfway between the numbers $a$ and $b$ can be found using the formula $\dfrac{a+b}{2}$ .
Use this formula to find the number halfway the two given number to obtain:
\begin{align*}
\require{cancel}
&=\frac{-\frac{2}{3}+\left(-\frac{5}{6}\right)}{2}\\\\
&=\frac{-\frac{4}{6}+\left(-\frac{5}{6}\right)}{2}\\\\
&=\frac{-\frac{9}{6}}{2}\\\\
&=-\frac{9}{6} \times \frac{1}{2}\\\\
&=-\frac{9}{12}\\\\
&=-\frac{\cancel{9}3}{\cancel{12}4}\\\\
&=-\frac{3}{4}
\end{align*}
