During a two-month period, the price of a gallon of gas increased by 15% after the first month and then decreased by 10% of this new price at the end of the second month. If the price of gas was y dollars per gallon at the beginning of the two-month period, what was the price, in dollars per gallon, by the end of the period?

Question

TheoryPractice · Accepted Answer

1.035x. At the end of the first month, the price of a gallon of gas was 1.15x. At the end of the second month, the price was 10% less than 1.15x, or (0.90)(1.15x) = 1.035x.

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