Answer
$269\text{ movies}$
Work Step by Step
Multiplying the rate, $\dfrac{9}{20},$ by the number of movies, then
\begin{array}{l}\require{cancel}
\dfrac{9}{20}(599)
\\\\=
269.55
.\end{array}
To the nearest whole movie, then there are $
269\text{ movies}
$ that are rated PG-$13.$
