Answer
$-450^{\circ}$
Work Step by Step
In order to convert the result from radians to degrees, we multiply by $\dfrac{180^{\circ}}{\pi}$.
Therefore
$\dfrac{-5 \pi}{2}\text{radians} \\=\dfrac{-5 \pi}{2} \times \dfrac{180^{\circ}}{\pi} =-450^{\circ}$
