instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: by selling an article for $ 225 a person gains $ 75 . what is the gain % ?
answer:
50 %


question:
Problem: the average of 10 numbers is 0 . in those 10 , at the least , how many may be greater than or equal to zero ?
answer:
1


question:
Problem: 50 % of a number is more than 40 % of 120 by 180 . find the number ?
answer:

456