Task: Question Answering
Input (English): Problem: if the simple interest on $ 1500 increase by $ 20 , when the time increase by 2 years . find the rate percent per annum . 
Options: a ) 0.6 % , b ) 0.5 % , c ) 0.1 % , d ) 0.2 % , e ) 0.7 %
Output (English): e