Kate decides to replace all the lights in her college apartment with energy saving light bulbs beginning this month. The packaging says the new bulbs will use 75% less electricity. If Kate's electric bill last month was $7.29 from bulb use alone, project how much Kate's electric bill will be this month for bulb use. Round your answer to the nearest cent.
Mathematics · Middle School · Thu Feb 04 2021
Answered on
Given
Old Bill for one bulb use = $7.29
Percentage of reduction in bill = 75%
To find the new bill, we have to find the amount of saving that Kate will get by using the energy saver and then the amount will be subtracted from the previous bill of $7.29
So, the new bill will be:
new bill = old bill - saving
= 7.29-(7.29*75%)
= 7.29-5.4675
=$1.8225
Hence the bill this month will be $1.8225