Suppose you can buy $743$ shares of Vertex Pharmaceuticals Incorporated $($VRTX$)$ stock on margin at $$172$ per share. Your initial margin is $53\%$ and you borrow at the $5$ percent. You sell your VRTX shares $10$ months later for $$157$ per share. There were no dividends paid and the prices reflect commissions paid. What is your percent return if you buy on margin?

$[$Enter the answer in as a percent $($e$.$g$.,5\mathrm{.}55\%=5\mathrm{.}55)-$ not a decimal$]$