In november 2017, gas was selling for $3.31 a gallon. this was $.85 cheaper than a year before. what was the percent decrease?

Step-by-step explanation:

so gas was selling for 3.31that is 85 cents cheaper then a yr beforeso a year before it costs (3.31 + 0.85) = 4.16

% decrease = (decrease / original cost) * 100

                    = (0.85 / 4.16) * 100

                    = 0.2043 * 100

                     = 20.43% decrease <==

can i get the link to the assignment?

step-by-step explanation:

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