Answer
$-\dfrac{15}{4}$
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{-4+\left(-\frac{7}{2}\right)}{2}\\\\
&=\frac{-\frac{8}{2}+\left(-\frac{7}{2}\right)}{2}\\\\
&=\frac{-\frac{15}{2}}{2}\\\\
&=-\frac{15}{2} \times \frac{1}{2}\\\\
&=-\frac{15}{4}\\\\
\end{align*}
