2003 Cayley Problem 10

There are 2 girls and 6 boys playing a game. How many additional girls must join the game so that \frac{5}{8} of the players are girls?

\textbf{(A)}\ 6\quad \textbf{(B)}\ 3\quad \textbf{(C)}\ 5\quad \textbf{(D)}\ 8\quad \textbf{(E)}\ 7

If there are no answer choices shown, enter a numerical answer.

Full credit to this problem is given to the CEMC, you may view all Cayley contests here.