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

Ex Input:
Problem: you enter a weight loss challenge game and manage to lose 12 % 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 ?

Ex Output:
10.24 %


Ex Input:
Problem: in an election between two candidates , one got 60 % of the total valid votes , 30 % of the votes were invalid . if the total number of votes was 9000 , the number of valid votes that the other candidate got , was :

Ex Output:
2520


Ex Input:
Problem: evaluate : | 5 - 8 ( 3 - 12 ) | - | 5 - 11 | = ?

Ex Output:

71