Task: Question Answering
Input (English): Problem: the price of a certain painting increased by 20 % during the first year and decreased by 15 % during the second year . the price of the painting at the end of the 2 - year period was what percent of the original price ? 
Options: a ) 102 % , b ) 105 % , c ) 120 % , d ) 135 % , e ) 140 %
Output (English): a