xaio aims to get 8 hours of sleep per week night. on monday night he slept for 6 1/3 hours, on tuesday night he slept for 7 1/2 hours, on wednesday night 5 3/4 hours and on thursday night 8 1/4 hours
after 4 nights, how much is xaio ahead or behind in terms of his sleep goal?
6 1/3 = 7/3 = 28/12
7 1/2 = 15/2 = 30/12
5 3/4 = 23/4 = 69/12
8 1/4 = 33/4= 99/12
sum for 4 days = 226/12 = 113/6
needs 8 * 4 = 32 = 192/6
missing 79/6 = 13 1/6