Question

In 1975, the average price per gallon of gasoline was $0.90. In 2009, the average price per gallon is $1.70. What is the percent of change in the price per gallon?

a) 80%
b) 87.5%
c) 90%
d) 88.9%

Answer 1

The percent of change in the price per gallon of gasoline from 1975 to 2009 is calculated using the formula Percent of Change = ((New Price - Old Price) / Old Price) × 100, which yields approximately 88.9%.

Step-by-step explanation:

To calculate the percent of change in the price per gallon of gasoline from 1975 to 2009, we use the following formula: Percent of Change = ((New Price - Old Price) / Old Price) × 100. In this case, the new price in 2009 is $1.70 and the old price in 1975 is $0.90.

So, the percent of change is ((1.70 - 0.90) / 0.90) × 100, which equals (0.80 / 0.90) × 100. After doing the calculations, the result is approximately 88.9%. Therefore, the correct answer is 88.9%, which corresponds to option (d).