ANSWER
[tex]52\operatorname{\%}[/tex]
EXPLANATION
To find the percent of her class that spent 9 - 16 hours each week doing math homework, we have to divide the number of people that do their homework that fall in the categories of 9 - 12 and 13 - 16 by the total number of students surveyed and multiply by 100.
That is:
[tex]\begin{gathered} \frac{10+3}{3+4+5+10+3}*100 \\ \\ \frac{13}{25}*100 \\ \\ 52\% \end{gathered}[/tex]
That is the correct answer.
