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debra usually works 16 hours a week, but this week she worked 22 hours. what is the change in her hours?

an increase of 6 hours
an increase of 37.5%
an increase of 27.3%
a decrease of 6 hours

If you would like to know the change in Debra's hours, you can calculate this using the following steps:

x% of 16 hours is 22 hours
x% * 16 = 22
x/100 * 16 = 22
x = 22 * 100 / 16
x = 137.5%

137.5% - 100% = 37.5%

22 hours - 16 hours = 6 hours

The correct result would be: an increase of 6 hours, and an increase of 37.5%.