The task is to generate the correct answer for a given math problem.

Input: Consider Input: Problem: mary can do a piece of work in 26 days . rosy is 30 % more efficient than mary . the number of days taken by rosy to do the same piece of work is ?

Output: 20


Input: Consider Input: Problem: a merchant sells an item at a 20 % discount , but still makes a gross profit of 20 percent of the cost . what percent of the cost would the gross profit on the item have been if it had been sold without the discount ?

Output: 50 %


Input: Consider Input: Problem: a no . when divided by 158 gives a remainder 50 , what remainder will be obtainedby dividingthe same no . 16 ?


Output: 13