Percentages

Question

Studies have shown that college students get about 6 1/2 hours of sleep per night on average, but that academic achievement improves when students average 8 hours of sleep. What percentage of the hours in a week would be devoted to sleep if you get 6 1/2 hours of sleep per night? what if you get 8 hours?

Answer 1

Total hours in a week: 7*24= 168 hrs

With 6.5 hours per night sleep, total hrs of sleep per week= 6.5*7= 45.5 hrs, % of hrs= 45.5/168*100=27.1%

With 8 hours per night sleep, total hrs of sleep per week= 8*7= 56 hrs, % of hrs= 56/168*100=33.33%