Answer
$\left(-\dfrac{2}{5}, \dfrac{1}{10}\right)$
Work Step by Step
RECALL:
The midpoint of $(x_1, y_1)$ and $(x_2, y_2)$ can be found using the midpoint formula
$\text{midpoint}=\left(\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2}\right)$
Use the formula above to obtain:
$\text{midpoint}
\\=\left(\dfrac{-\frac{2}{5}+(-\frac{2}{5})}{2}, \dfrac{\frac{7}{15}+(-\frac{4}{15})}{2}\right)
\\=\left(\dfrac{-\frac{4}{5}}{2}, \frac{\frac{3}{15}}{2}\right)
\\=\left(-\dfrac{4}{5(2)}, \dfrac{3}{15(2)}\right)
\\=\left(-\dfrac{4}{10}, \dfrac{3}{30}\right)
\\=\left(-\dfrac{2}{5}, \dfrac{1}{10}\right)$
