Answer
$\frac{1}{5}$
Work Step by Step
The first fraction we would write is just $\frac{8}{40}$. Then, keep reducing until you can't anymore to get the simplest form.
$8$ $\div$ $8$ $=$ $1$
$40$ $\div$ $8$ $=$ $5$
$\frac{1}{5}$ is your answer.