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

Ex Input:
Problem: at what rate percent on simple interest will rs . 750 amount to rs . 900 in 8 years ?

Ex Output:
2.5 %


Ex Input:
Problem: a rectangular plot measuring 90 metres by 50 metres is to be enclosed by wire fencing . if the poles of the fence are kept 10 metres apart , how many poles will be needed ?

Ex Output:
28


Ex Input:
Problem: if an organization were to sell n tickets for a theater production , the total revenue from ticket sales would be 20 percent greater than the total costs of the production . if the organization actually sold all but 5 percent of the n tickets , the total revenue from ticket sales was what percent greater than the total costs of the production ?

Ex Output:

14 %