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Percent Increase and Decrease - pearsoncmg.com

Grade 7 Teacher Guide Percent Increase and Decrease LAUNCH (7 MIN) _____ Before What are two ways to compare population growth in the two towns? During Which quantity changed more? Why isn t that enough to make a decision? After With whose opinion do you agree? Why? KEY CONCEPT (4 MIN) _____ Emphasize that you only need to know two quantities to find Percent of change: the original quantity and the amount of change. Why is the equation for Percent Increase the same as the one for Percent Decrease ? PART 1 (7 MIN) _____ Before solving the problem What is meant by Percent Increase ? Does a greater amount of Increase always mean a greater Percent of Increase ? Javier Says (Screen 1) Use the Javier Says button to connect Percent of change to part-to-whole ratios, connecting Percent change to scenarios students are already familiar with.

Percent Increase and Decrease continued – grade 7 • Teacher Guide . ) _____ percent is the percent of change as an increase or decrease.

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