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Learning Target: Find percents of change in quantities. 6.4 Percent Increase or Decrease All notes must be copied and turned into Mr. Attaway COPY Percent of Increase A percent of change is the percent that a quantitychanges from the original amount. Key Idea: Percent of Change=Amount of Change = New amount - Original Amount Original Amount Original Amount Percent of Increase=new amount-original amount Saturday Sunday Percent of increase = 4.5 - 2 Day 4.5 Hours on Line 2 The table shows the number of hours spent online. 1.25, is 125% original amount = 2.5 ? 2 ? 2 So, there is a 125% increase in time spent on theinternet. We could write it as +125% Find the Percent Change. Round to the nearest tenth of a percent. = % of Change= New amount - Original Amount 15 10 25 inches - 10 inches 10 inches to 25 inches 10 inches 1.5 ? So, it is a 150% increase Original Amount 150 ? % Find the Percent Change. Round to the nearest tenth of a percent. = % of Change= New amount - Original Amount 857 65 people - 57 people 57 people 57 people to 65 people 0.1403508 (Round) .14 ? Original Amount 0.1403508 (Round) 14.0 ? % Finding Percent of Decrease = Compare 2016 and 2017 = 0.2857142 = 28 - 20 28 828 (Round) Round to the Nearest Tenth of the Percent 12 inches to 36 inches Finding the Percent Change % Decrease Increase 75 people to 25 people Round to the Nearest Tenth of the Percent Finding the Percent Change % Decrease Increase 50 pounds to 35 pounds Round to the Nearest Tenth of the Percent Finding the Percent Change % Decrease Increase Round to the Nearest Tenth of the Percent 24 songs to 78 songs Finding the Percent Change % Decrease Increase Round to the Nearest Tenth of the Percent 10 gallons to 24 gallons Finding the Percent Change % Decrease Increase 72 paper clips to 63 paper clips Round to the Nearest Tenth of the Percent Finding the Percent Change % Decrease Increase 16 centimeter to 44.2 centimeter Round to the Nearest Tenth of the Percent Finding the Percent Change % Decrease Increase Round to the Nearest Tenth of the Percent 68 miles to 42.5 Finding the Percent Change % Decrease Increase |