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