To find the amount of electricity they used the second month, we need to multiply the amount used the first month by 1 minus the percent reduction (as a decimal).
Amount used the second month = 1,100 kWh * (1 - 14%) = 1,100 kWh * (1 - 0.14) = 1,100 kWh * 0.86 = 946 kWh
The correct answer is C. 946 kWh.
A household uses 1,100 kilowatt-hours of electricity in one month. After buying new energy-saving appliances, they reduced their use of electricity the next month by 14%.
How many kilowatt-hours of electricity did they use the second month?
A. 627 kWh
B. 154 kWh
C. 946 kWh
D. 473 kWh
1 answer
1 answer