Question

Suppose a student usually gets 5.28 hours of sleep. A teacher wants the student to get 8 hours of sleep. What is the percent increase in the number of hours that the student will sleep? Round your answer to the nearest whole percent.

Answer 1

52%

Explanation:

Number of hours of sleep a student gets = 5.28hrs

A teacher wants the student to get = 8hrs of sleep

Unknown:

Percentage increase in the number of hours the student will sleep = ?

Solution:

Percentage increase =
`(New sleep hours - former sleep hours)/(former sleep hours)` x 100

Percentage increase =
`(8 - 5.28)/(5.28)` x 100 = 51.5%

Percentage increase = 52%