Estimate answers to percent problems involving 50%, 25%, and 15%

What is 50% of 2,595,603?

Type in numbers only in the answer

Answer = 1($)

What is 25% of 43.02?

Answer ≈ 1($)

To find 5% of a number, find 1($) of the number by moving the decimal point in the number 2($) place to the 3($).  Then, divide that result by 4($).

The average U.S. household uses 10,656 kilowatt-hours of electricity each year.  Several energy conservation groups would like each household to take steps to reduce its electricity usage by 5%.  Estimate 5% of 10,656 kilowatt-hours.

(Source: U.S. Department of Energy)

Answer = 1($)

As a general rule, if the service in a restaurant is acceptable, a tip of 15% of the total bill should be left for the server.  Estimate the 15% tip on a $77.55 dinner bill.

Answer = 1($) USD