In a work-out facility, there are two racks with 40 towels per rack. on tuesday, there were 30 towels in use, on wednesday 50, and on thursday 25. what fraction, on average, is in use for the 3 days?

The capacity is 2 racks, with up to 40 towels per rack, for a maximum of 80 towels o a given day.

Tuesday: 30 towels

Wednesday: 50 towels

Thursday: 25 towels

Total towel usage for the 3 days is 30 + 50 + 25 = 105

Average usage per day is

105/3 = 35 towels per day.

Because the capacity is 80 towels, the fractional usage per day is

35/80 = 7/16

Answer: 7/16