Answer
$$\frac{1}{20}.
$$
Work Step by Step
We have
$$
\frac{2}{5}\times \frac{1}{8}=\frac{2\times1}{5\times 8}=\frac{1}{5\times 4}=\frac{1}{20}.
$$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.