Answer :
The percentage increase in the cost of a gallon of gas according to the description given is; 80%.
What is the percentage increase in the cost of a gallon of gas?
It follows from the task content that the percentage increase in the cost of a gallon of gas is to be determined.
Since the percent increase is given by the formula;
%increase = (∆price/initial price) × 100%
= (6.30 - 3.50)/3.50 × 100%
= 2.80/3.50 × 100%
= 80%.
Ultimately, thee required percentage increase in the cost per gallon of gas is; 80%.
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