Task: Question Answering
Input (English): Problem: a trader bought a car at 30 % discount on its original price . he sold it at a 50 % increase on the price he bought it . what percent of profit did he make on the original price ? 
Options: a ) 7 % , b ) 62 % , c ) 12 % , d ) 19 % , e ) 5 %
Output (English): e