Task: Question Answering
Input (English): Problem: if the price of an article went up by 30 % , then by what percent should it be brought down to bring it back to its original price ? 
Options: a ) 25 % , b ) 23 1 / 13 % , c ) 16 7 / 3 % , d ) 16 6 / 3 % , e ) 16 2 / 3 %
Output (English): b