1. Percent Change
Unit 6
Math 7

2. Percent of Change Important Vocabulary: Percent of Change –
Amount a quantity increases or decreases from its original amount
To Find Percent of Change –

3. Percent of Change Percent Increase – Examples
Find the percent change from 4 to 7.5
Find the difference of the two amounts:
Calculate the percent of increase:
There was an 87.5% increase.

4. Percent of Change Percent Increase – Examples
Find the percent increase from 8 to 9.6
Find the difference of the two amounts:
Calculate the percent of increase:
There was a 20% increase.

5. Percent of Change Percent Increase – Examples
Find the percent increase from 100 to 114
Find the difference of the two amounts:
Calculate the percent of increase:
There was a 14% increase.

6. Percent of Change Percent Increase – Examples
Find the percent increase from 2 to 3.2
Find the difference of the two amounts:
Calculate the percent of increase:
There was a 60% increase.

7. Percent of Change Percent Decrease– Examples
Find the percent decrease from 1,250 to 1,120
Find the difference of the two amounts:
Calculate the percent of decrease:
There was a 10.4% decrease.

8. Percent of Change Percent Decrease– Examples
Find the percent decrease from 9.6 to 4.8
Find the difference of the two amounts:
Calculate the percent of decrease:
There was a 50% decrease.

9. Percent of Change Percent Decrease– Examples
Find the percent decrease from 120 to 95
Find the difference of the two amounts:
Calculate the percent of decrease:
There was a 20.83% decrease.

10. Percent of Change Percent Change – Examples
In a given year, Hillsborough had a total of 7.5 inches of rain by March 1 and a total of 22.5 inches by July 1. Find the percent of increase from 7.5 to
Find the difference of the two amounts:
Calculate the percent of increase:
There was a 200% increase in rain between March and July.

11. Percent of Change Percent Change – Examples
The average cost of a gallon of gasoline increased to $2.99 per gallon from $ Find the percent change.
Find the difference of the two amounts:
Calculate the percent change:
There was a 4.9% increase in gasoline prices.