Makarla attended two meetings during her $9$-hour work day. The first meeting took $45$ minutes and the second meeting took twice as long. What percent of her work day was spent attending meetings?
$\textbf{(A)}\ 15 \qquad \textbf{(B)}\ 20 \qquad \textbf{(C)}\ 25 \qquad \textbf{(D)}\ 30 \qquad \textbf{(E)}\ 35$
The total number of minutes in her $9$-hour work day is $9 \times 60 = 540.$
The total amount of time spend in meetings in minutes is $45 + 45 \times 2 = 135.$
The answer is then $\frac{135}{540}$ $= \boxed{25\%}$ or  $\boxed{(C)}$