5.6 Finding Percent of Change

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Presentation transcript:

5.6 Finding Percent of Change I can find percents of increase and percents of decrease.

Percent Change Expresses an amount of change as a percent of an original amount. If a new amount is greater, the change is a percent increase. If a new amount is less, it is a percent decrease. Ratio of the amount of change to the original amount Percent of change = 𝑏𝑖𝑔𝑔𝑒𝑟 𝑎𝑚𝑜𝑢𝑛𝑡−𝑠𝑚𝑎𝑙𝑙𝑒𝑟 𝑎𝑚𝑜𝑢𝑛𝑡 𝑜𝑟𝑖𝑔𝑖𝑛𝑎𝑙 𝑎𝑚𝑜𝑢𝑛𝑡 ∙ 100

Finding a Percent Change A coat is on sale for $74.50. The original price was $82. what is the discount expressed as a percent change? This is a percent decrease. 𝑏𝑖𝑔𝑔𝑒𝑟−𝑠𝑚𝑎𝑙𝑙𝑒𝑟 𝑜𝑟𝑖𝑔𝑖𝑛𝑎𝑙 82−74.50 82 = 7.5 82 ≈0.09, or 9% decrease

You Try! A store buys an electric guitar for $295 and marks up the price to $340. What is the markup expressed as a percent change? ≈15%

Assignment Odds P.205 #9-31