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

[EX Q]: Problem: how many quarters are equal to 7 dollars ?
[EX A]: 28

[EX Q]: Problem: tourist purchased a total of 30 travelers checks in $ 50 and $ 100 denominations . the total worth of the travelers checks is $ 1800 . how many checks of $ 50 denominations can he spend so that average amount ( arithmetic mean ) of the remaining travelers checks is $ 100 ?
[EX A]: 2

[EX Q]: Problem: if y exceeds x by 25 % , then x is less than y by ?
[EX A]:
20 %