Task: Question Answering
Input (English): Problem: john spent 40 percent of his earning last month on rent and 30 percent less than what he spent on rent to purchase a new dishwasher . what percent of last month ' s earning did john have left over ? 
Options: a ) 30 % , b ) 32 % , c ) 45 % , d ) 68 % , e ) 70 %
Output (English): b