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

Example Input: Problem: positive integer y is 50 percent of 25 percent of positive integer x , and y percent of x equals 100 . what is the value of y ?
Example Output: 125

Example Input: Problem: by investing in 1623 % stock at 64 , one earns rs . 1500 . the investment made is
Example Output: rs . 5760

Example Input: Problem: the compound ratio of 7 : 6 , 3 : 2 and 4 : 5 ?
Example Output:
7 : 5