Question

gas cost $3.53 per gallon in may. in september, gas cost $3.05 per gallon. what was the percent change in the cost of a gallon of gas

Answer 1

If $3.53 is 100% then 3.05 is 86.5%
100%–86.4% is a 13.6% decrease in price

Answer 2

The percent change in the cost of a gallon of gas is 13.59 %

Solution:

We have been given the data of cost of Gas in two months these are May and September

The cost of Gas in month of may is $3.53 per gallon

The cost of Gas in month of September is $3.05 per gallon

We have to determine the percentage change in the cost of gas

Difference in cost of gas = 3.53 – 3.05= 0.48

$\% \text { change in cost of gas }=\frac{\text { Difference in cost of gas }}{\text { original price }} \times 100$

$\% \text { change in cost of gas }=\frac{0.48}{3.53} \times 100$

% change in cost of gas = 13.59 %

So, the price of the Gas was decreased by 13.59% from may to september