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Percent of Change

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Percent of Change A percent of change is the percent that a quantity changes from the original amount.

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Percent of Increase Percent of increase is when the original amount increases.

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Percent of Decrease Percent of decrease is when the original amount decreases.

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Percent Error A percent error is the percent that an estimated quantity differs from the actual amount.

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Practice Find the percent of change. Round to the nearest tenth of a percent if necessary. 12 inches to 36 inches

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Practice Find the percent of change. Round to the nearest tenth of a percent if necessary. 75 people to 25 people

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Practice Find the new amount. 8 meters increased by 25%

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Practice The table shows population data Year Population for a community. a. What is the percent of change from 2007 to 2013? b. Use this percent of change to predict the population in 2019.

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Practice A number increases by 10%, and then decreases by 10%. Will the result be greater than, less than, or equal to the original number? Explain.

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**Practice Suppose the length and the width of the sandbox are doubled.**

a. Find the percent of change in the perimeter. b. Find the percent of change in the area.

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