Darryl lent his sister `$4,450` to help her buy a house. In `2` years, she paid him the `$4,450`, plus `$445` interest. What was the rate of interest?

The rate was  %

Box 1: Enter your answer as an integer or decimal number. Examples: 3, -4, 5.5172
Enter DNE for Does Not Exist, oo for Infinity