Question

The price of a gallon of unleaded gas was $2.85 yesterday. Today, the price fell to $2.80. Find the percentage decrease

Answer 1

2.85(1-x) = 2.80

2.85 - 2.85x = 2.80

-2.85x = -0.05

x = 0.05/2.85

x = 0.0175

The price decreased by 1.75%