Answer
$\frac{13}{50}$ have speed limits less than 70mph.
Work Step by Step
$\frac{33}{50}-\frac{20}{50}=\frac{13}{50}$
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.