1. Algebra 1 Section 3 - 7

2. Objectives I can find percent of increase or decrease in story problems

3. Vocabulary Percent of Increase – New number is greater than the original

4. Vocabulary Percent of Decrease – New number is less than the original

6. State whether the following is a percent of increase or a percent of decrease. Then find the percent of change. Original 32 New 40

7. State whether the following is a percent of increase or a percent of decrease. Then find the percent of change. Original 32 New 40

8. State whether the following is a percent of increase or a percent of decrease. Then find the percent of change. Original 32 New 40

9. State whether the following is a percent of increase or a percent of decrease. Then find the percent of change. Original 32 New 40 32x = 800

10. State whether the following is a percent of increase or a percent of decrease. Then find the percent of change. Original 32 New 40 32x = 800 32 x = 25

11. State whether the following is a percent of increase or a percent of decrease. Then find the percent of change. Original 32 New 40 32x = 800 32 x = 25% Increase

12. State whether the following is a percent of increase or a percent of decrease. Then find the percent of change. Original 20 New 4

13. State whether the following is a percent of increase or a percent of decrease. Then find the percent of change. Original 20 New 4

14. State whether the following is a percent of increase or a percent of decrease. Then find the percent of change. Original 20 New 4

15. State whether the following is a percent of increase or a percent of decrease. Then find the percent of change. Original 20 New 4 20x = 1,600

16. State whether the following is a percent of increase or a percent of decrease. Then find the percent of change. Original 20 New 4 20x = 1,600 20

17. State whether the following is a percent of increase or a percent of decrease. Then find the percent of change. Original 20 New 4 20x = 1,600 20 x = 80

18. State whether the following is a percent of increase or a percent of decrease. Then find the percent of change. Original 20 New 4 20x = 1,600 20 x = 80% Decrease

19. The National Football League (NFL) has a standard field of 120 yards. The Canadian Football League has a standard field that is 25% longer. What is the length of a CFL field?

22. 100x = 3,000

23. The National Football League (NFL) has a standard field of 120 yards. The Canadian Football League has a standard field that is 25% longer. What is the length of a CFL field? 100x = 3,000 100 x = 30

24. The National Football League (NFL) has a standard field of 120 yards. The Canadian Football League has a standard field that is 25% longer. What is the length of a CFL field? 100x = 3,000 100 x = 30 150 yards

25. A used book store will buy a book for $5. The store then sells the book for 25% more. What does a $5 book sell for?

28. 100x = 125

29. A used book store will buy a book for $5. The store then sells the book for 25% more. What does a $5 book sell for? 100x = 125 100 x = $1.25 more

30. A used book store will buy a book for $5. The store then sells the book for 25% more. What does a $5 book sell for? 100x = 125 100 x = $1.25 more$6.25 Selling Price

31. The percent of increase is 25%. If the new number is 10, find the original.

33. The percent of increase is 25%. If the new number is 10, find the original.

34. The percent of increase is 25%. If the new number is 10, find the original. 25x = 100(10 – x) 25x = 1,000 – 100x +100x 125x = 1,000

35. The percent of increase is 25%. If the new number is 10, find the original. 25x = 100(10 – x) 25x = 1,000 – 100x +100x 125x = 1,000 125

36. The percent of increase is 25%. If the new number is 10, find the original. 25x = 100(10 – x) 25x = 1,000 – 100x +100x 125x = 1,000x = 8 125

37. The percent of increase is 25%. If the new number is 10, find the original. 25x = 100(10 – x) 25x = 1,000 – 100x +100x 125x = 1,000x = 8 original number 125

38. Stop the guided notes here. We will finish the rest of the slideshow in class.

39. A meal for 2 at a restaurant costs $32.75. If the sales tax is 5%, what is the cost of the meal?

42. 100x = 163.75

43. A meal for 2 at a restaurant costs $32.75. If the sales tax is 5%, what is the cost of the meal? 100x = 163.75 100 x = 1.6375 in tax $32.75 + $1.6375 = $34.39

44. A dog toy is on sale for 20% off the original price of $3.80. What is the discounted price?

47. 100x = 76

48. A dog toy is on sale for 20% off the original price of $3.80. What is the discounted price? 100x = 76 100 x = $0.76 less $3.80 - $0.76 = $3.04

49. Classwork Pg 162 14 – 44 (even)