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: a rectangle having length 105 cm and width 40 cm . if the length of the rectangle is increased by twenty five percent then how much percent the breadth should be decreased so as to maintain the same area .
Example Output: 19.23 %

Example Input: Problem: what is the compound interest paid on a sum of rs . 3000 for the period of 2 years at 10 % per annum .
Example Output:
630