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

[Q]: Problem: find compound interest on $ 10000 at 15 % per annum for 2 years 4 months , compounded annually .
[A]: 3886.25

[Q]: Problem: a store reduced the price of all items in the store by 12 % on the first day and by another 10 % on the second day . the price of items on the second day was what percent of the price before the first reduction took place ?
[A]: 79.2

[Q]: Problem: 5 / 8 of 3 / 10 of a number is greater than 4 / 9 of 1 / 4 of the same number by 55 . what is half of that number ?
[A]:
36