Sparty loaned you $$300$ to buy tickets to last night's basketball game. He expects you to pay him back with monthly payments of $$26\mathrm{.}24$ over the next year. What is the annual rate of interest he is charging you.

ROUND YOUR ANSWER TO THE NEAREST WHOLE NUMBER, AND ENTER YOUR ANSWER AS A WHOLE NUMBER WITHOUT THE PERCENT SIGN $($i$.$e$.10\%$ should be entered as $10,$ not $\mathrm{.}1$ or $10\%).$