Kate decides to replace all the lights in her college apartment with energy savi
ID: 3198536 • Letter: K
Question
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. 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.Explanation / Answer
Kate's bill last month = $7.29.
Savings on the new bulbs = 75%.
=> Usage percent of the new bulbs = 100% - 75% = 25%.
=> Kate's new bill
= $7.29 * 25 / 100
= $1.8225
(Rounding to nearest cent gives $1.82.)
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