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

Input: Consider Input: Problem: by selling an article for $ 225 a person gains $ 75 . what is the gain % ?

Output: 50 %


Input: Consider Input: Problem: what is the probability of getting a queen or spade from a set of cards ?

Output: 4 / 13


Input: Consider Input: Problem: a bag of potatoes weighs 50 lbs divided by half of its weight . how much does the bag of potatoes weigh ?


Output: 10 lb