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

[EX Q]: Problem: maxwell leaves his home and walks toward brad ' s house at the same time that brad leaves his home and runs toward maxwell ' s house . if the distance between their homes is 72 kilometers , maxwell ' s walking speed is 6 km / h , and brad ' s running speed is 12 km / h . what is the distance traveled by maxwell when they meet in the middle ?
[EX A]: 24

[EX Q]: Problem: what decimal fraction is 90 ml of a litre ?
[EX A]: . 09

[EX Q]: Problem: mary ' s income is 60 percent more than tim ' s income , and tim ' s income is 60 percent less than juan ' s income . what percent of juan ' s income is mary ' s income ?
[EX A]:
64 %