TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: a can do a work in 15 days and b in 20 days . if they work on it together for 5 days , then the fraction of the work that is left is

SOLUTION: 5 / 12

PROBLEM: Problem: a house wife saved $ 5 in buying an item on sale . if she spent $ 48 for the item , approximately how much percent she saved in the transaction ?

SOLUTION: 10 %

PROBLEM: Problem: what is the least common multiple of 12,27 and 40

SOLUTION:
1080