Task: Question Answering
Input (English): Problem: john and david can finish a job together in 2 hours . if john can do the job by himself in 3 hours , what percent of the job does david do ? 
Options: a ) 36.33 % , b ) 33.33 % , c ) 39.33 % , d ) 40.33 % , e ) 33 %
Output (English): b