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Home > CC2 > Chapter 7 > Lesson 7.1.3 > Problem 7-33


A homeowner must reduce the use of his home’s electricity. The home currently consumes 25.7 kwh (kilowatt hours) of electricity per day, and the homeowner must reduce the use by 20%. Find the amount of electricity that will be used after the reduction in two different ways, using two different scale factors. Homework Help ✎

Find 20% of the amount of electricity used.

Once you have found the amount of reduction, subtract that from the original amount of power consumption.

25.7 − 5.14 = 20.56 kwh
If you reduce the use of electricity by 20%, what percentage is left?