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Whole group practice

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Standard

7.RP.A.3 Use proportional relationships to solve multi-step ratio and percent problems. Examples: batting averages, recipes, simple interest, tax, markups and markdowns, gratuities and commissions, fees, percent increase and decrease, percent error, etc.

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Percentage change word problems (practice) | Khan Academy

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Percent change is the percent an amount increases or decreases.

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Work with your shoulder partner to solve these percent of change problems for 20 minutes

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Watch this video from Math with Mr. J for an introduction into percent change!

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Percent of Change | Percent Increase and Decrease | Math with Mr. J

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Percent Increase and Decrease Word Problems

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Percent Increase and Decrease Word Problems

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Follow these steps to find percent of change

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Follow these steps to find percent of change

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1. SUBTRACT the new and original amounts to find the change.

2. DIVIDE by the original amount.

3. CONVERT the decimal to a percent.

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Divide the amount of change by the original amount. The quotient can then be converted to a percentage.

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Fran calculated that she would need 10 yards of wallpaper to decorate her room. The wallpaper she chose has a large design so instead she needed 13 yards of that paper. What is the percent of change in the amount of wallpaper she needs?