Notes for Lesson 2-10: Percent Increase and Decrease

1 Notes for Lesson 2-10: Percent Increase and Decrease - Finding the Percent Increase or Decrease Vocabulary: Percent Increase - an Increase given as a Percent of the original amount Percent Decrease - a Decrease given as a Percent of the original amount - Finding the Percent of change The Percent of change = amount of Increase or Decrease divided by the original amount Examples: Find each Percent of change and tell whether it is an Increase or Decrease From 25 to 49 From 50 to 45 49 25 is aincrease 50 45 is adecrease Practice B #'s 3, 4 - Finding the result of a Percent change New amount = original amount the change Examples: Find the result when 30 is increased by 20% 20% 30 630 636ofNewnew amount Find the result when 65 is decreased by 80% 80% 655265 5213ofNewNew - Discounts Vocabulary: Discount - an amount by which an original price is reduced Examples.

2 Admission to the football game is $8. Students receive a 15% discount. How much do students have to pay to see the football game? 15%$ , $8 $ $ students Chris used a coupon and paid $ for a pizza that normally costs $ Find the Percent discount.. amtdiscountdiscountdiscountor - Markups Vocabulary: Markup - an amount by which a wholesale cost is increased Examples: Kyle buys necklaces at a wholesale cost of $48 each. He then marks up the price by 75% and sells the necklaces. What is the amount of the markup? What is the selling price? 75% 483648 36 84$84ofdollar markupHe sells them for Practice B #'s 10, 11, 12, 14