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

Example Input: Problem: you enter a weight loss challenge game and manage to lose 13 % of your body weight . for the final weigh in you are forced to wear clothes that add 2 % to your weight . what percentage of weight loss is measured at the final weigh in ?
Example Output: 11.26 %

Example Input: Problem: the area of a triangle is with base 12 m and height 5 m ?
Example Output: 30 m 2

Example Input: Problem: if y exceeds x by 20 % , then x is less than y by ?
Example Output:
16 2 / 3 %