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