conversations.from: human
conversations.value: A custodian has to clean a school with 80 classrooms. They have 5 days to get it done. It takes them 15 minutes per classroom. If they work an 8 hour day, what percentage of their day, on average, is spent cleaning classrooms?
  Work out the solution step by step.
conversations.from: assistant
conversations.value: They have to clean 16 classrooms a day because 80 / 5 = 16
  They spend 240 minutes cleaning per day because 16 x 15 = 240
  They spend 4 hours a day because 240 / 60 = 4
  They spend half their day cleaning classrooms because 4 / 8 = .5
  They spend 50% of their day cleaning classrooms because .5 x 100 = 50