Task: Question Answering
Input (English): Problem: at a local appliance manufacturing facility , the workers received a 15 % hourly pay raise due to extraordinary performance . if one worker decided to reduce the number of hours that he worked so that his overall pay would remain unchanged , by approximately what percent would he reduce the number of hours that he worked ? 
Options: a ) 13 % , b ) 80 % , c ) 20 % , d ) 17 % , e ) 12 %
Output (English): a