On any sum of money, the simple interest is 25/16 of the principal amount on some rate of interest. If the numbers showing the rate of interest and time in years are the same then what is the rate of interest?
1
\(33 \frac{1}{3}\%\)
2
\(11 \frac{1}{9}\%\)
3
\(12 \frac{1}{2}\%\)
4
\(37 \frac{1}{2}\%\)