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

[EX Q]: Problem: by selling an article for $ 225 a person gains $ 75 . what is the gain % ?
[EX A]: 50 %

[EX Q]: Problem: the total age of a and b is 12 years more than the total age of b and c . c is how many year younger than a
[EX A]: 12

[EX Q]: Problem: convert 2 / 5 to a decimal
[EX A]:
0.4