amaritzapatton amaritzapatton

03-12-2021
Mathematics

contestada

The average cost of gas in 2015 was $3.40. The average cost of gas in 2018 was $2.35. What is the percent decrease in the cost?

Respuesta :

reinhard10158 reinhard10158

03-12-2021

Step-by-step explanation:

100% = $3.40

1% = 100%/100 = 3.4 / 100 = 0.034

the price difference between 2015 and 2018 is

3.4 - 2.35 = 1.05

how many % of the original price in 2015 is this ?

1.05 / 0.034 ≈ 30.88

so, the price decrease was about 30.88%

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