Suppose that $15$ years ago, you borrowed a certain amount of money. The loan had an annual interest rate of $6\mathrm{.}1\%$ with continuous compounding, and today you repaid a total of $$72,219.$

How much interest did you pay on this loan, as a percentage of how much you borrowed? For example, if you borrowed $$1000$ and you paid $$175$ in interest, the answer would be $17\mathrm{.}5($percent$).$