Understanding Percent Change

The video tutorial explains how to calculate the percent change in the price of a gallon of gas, which increased from $3.99 to $4.29 overnight. It outlines the steps to find the percent change: calculate the difference between the new and old values, divide by the old value, multiply by 100, and add a percent sign. The tutorial demonstrates the calculation, resulting in a 7.5% increase, and explains that a positive value indicates an increase.

What was the initial price of a gallon of gas before the increase?

• $3.50

• $4.29

• $3.99

• $4.00

Which of the following steps is NOT part of calculating the percent change?

• Multiply by 100

• Add a percent sign

• Divide by the new value

• Find the difference between the new and old values

What is the difference between the new and old values in this problem?

• $0.25

• $0.20

• $0.50

• $0.30

What is the approximate percent change in the price of gas?

• 6.5%

• 8.5%

• 5.5%

• 7.5%

What does a positive percent change indicate in this context?

• A decrease in price

• An increase in price

• No change in price

• A stable price