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

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: 475.124 x 15.98 ÷ 8.001 + 33.33 = ?
Example Output: 983.578

Example Input: Problem: on the first of the year , james invested x dollars at proudstar bank in an account that yields 2.5 % in interest every quarter year . at the end of the year , during which he made no additional deposits or withdrawals , he had y dollars in the account . if james had invested the same amount in an account which pays interest on a yearly basis , what must the interest rate be for james to have y dollars at the end of the year ?
Example Output:
10.5