Percent Change Unit 6 Math 7.

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Presentation transcript:

Percent Change Unit 6 Math 7

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

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.

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.

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.

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.

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.

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.

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.

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 22.5. Find the difference of the two amounts: Calculate the percent of increase: There was a 200% increase in rain between March and July.

Percent of Change Percent Change – Examples The average cost of a gallon of gasoline increased to $2.99 per gallon from $2.85. Find the percent change. Find the difference of the two amounts: Calculate the percent change: There was a 4.9% increase in gasoline prices.