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

Q: Problem: during a certain two - week period , 60 percent of the movies rented from a video store were comedies , and of the remaining movies rented , there were 3 times as many dramas as action movies . if no other movies were rented during that two - week period and there were a action movies rented , then how many comedies , in terms of a , were rented during that two - week period ?

A: 6 a
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Q: Problem: if mn ≠ 0 and 25 percent of n equals 37 1 / 2 percent of m , what is the value of 12 n / m ?

A: 18
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Q: Problem: by selling an article for $ 195 , a person gains $ 45 . what is the gain % ?

A:
30 %
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