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

[Q]: Problem: if the radius of a circle is decreased 60 % , what happens to the area ?
[A]: 84 % decrease


[Q]: Problem: anne bought doughnuts for a class breakfast party . she bought 9 chocolate doughnuts , 7 coconut doughnuts , and 9 jam - filled doughnuts . how many doughnuts did anne buy in all ?
[A]: 25


[Q]: Problem: how many positive integer solutions does the equation 8 x + 2 y = 100 have ?
[A]:
84