You made an investment over the past year, and your nominal return was $13\mathrm{.}9\%.$ Over the same year, the rate of inflation was $3\mathrm{.}7\%.$ What was the real rate of return for this investment?

Enter your answer as a percentage, rounded to two decimals, and without the percentage sign $(\text{'}\%\text{'}).$ For example, if your answer is $0\mathrm{.}123456,$ then it is equivalent to $12\mathrm{.}35\%,$ so you should enter $12\mathrm{.}35$ as the answer.