Question

The price of a gallon of unleaded gas has dropped to $2.81 today. yesterday's price was $2.88 . find the percentage decrease. round your answer to the nearest tenth of a percent.

Answer 1

we know that
price yesterday=$2.88
price today=$2.81
[the percentage decrease]=100-{[price today]/[price yesterday]}*100
[the percentage decrease]=100-{[2.81]/[2.88]}*100
[the percentage decrease]=100-{0.9757}*100----------> 2.43%

the answer is 2.4 %