A gallon of gasoline cost $3.09 two years ago. Now it costs $1.78. To the nearest percent, what has been the annual rate of decrease in cost?

Answers (1)
  1. Vishwa
    Given that a gasoline was $3.09 two years ago and it goes for $1.78 now, the rate of decrease will be:

    (Δ prices) / (time taken)

    = (1.78-3.09) / 2

    =-1.31/2

    =-.655 dollars per year.

    the answer is - 0.655 dollars per year
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