1. 5 Minute Check Complete on the back of your homework. 1. 75is 15% of what number ? 2. 9 is 36% of what number? 3. 7 is 70% of what number? 4. 7 is 35% of what number?

2. 5 Minute Check Complete on the back of your homework. 1. 75is 15% of what number ?

3. 5 Minute Check

4. Complete on the back of your homework. 2. 9 is 36% of what number?

5. 5 Minute Check

6. Complete on the back of your homework. 3. 7 is 70% of what number?

7. 5 Minute Check

8. Complete on the back of your homework. 4. 7 is 35% of what number?

9. 5 Minute Check

10. Flashcards

11. Tuesday, Sept 22 Lesson 2.8b Solve Percent Problems

12. Objective: To solve percent problems which involve finding the whole or part.

13. Solve Percent Problems 15 is 25% of what number? Percent Bar 0%25% 50% 75% 100% Number Bar 15

14. Solve Percent Problems 15 is 25% of what number? Proportion Method How to Solve a Percent Problem. Step 1 - Write a blank proportion.

15. Solve Percent Problems

25. 25% of 60 is what ?

26. Solve Percent Problems 25% of 60 is what ? 60 x.25 300 1200 15.00

27. Solve Percent Problems 30 is 60% of what number? Do this on your own.

28. Solve Percent Problems

29. 60% of 50 is what ? 50 x.6 30.0

30. Solve Percent Problems What percent of 20 is 4? Do this on your own.

31. Solve Percent Problems What percent of 20 is 4? Do this on your own.

32. Solve Percent Problems

33. 500% of 20 is what ? 20 x 5 100

34. Solve Percent Problems

35. 20% of 20 is what ? 20 x.2 4.0

36. Solve Percent Problems 30 is 75% of what number? Do this on your own.

37. Solve Percent Problems

39. 21 is 84% of what number? Do this on your own.

40. Solve Percent Problems

41. What percent of 25 is 10? Do this on your own.

42. Solve Percent Problems

43. The first year of ownership, a new car can lose 20% of its value. If a car lost $4,200 of value in the first year, how much did the car originally cost? Do this on your own.

44. Solve Percent Problems

45. Kai calculates that he spends 15% of a school day in science class. If he spends 75 minutes in science class, how many minutes does Kai spend in school? Do this on your own.

46. Solve Percent Problems

47. Before 1982, pennies were 95% zinc and 5% copper. If 100 pennies minted in 1980 have an approximate mass of 15 grams of copper, what is the total mass of 100 pennies? Do this on your own.

48. Solve Percent Problems

49. A store is having a sale where winter clothes are 60% of the original price. A sweater is on sale for $30. What was the original price of the sweater? Do this on your own.

50. Solve Percent Problems

51. If you have 3 cups of pineapple juice, how many total cups of punch can you make?

52. Solve Percent Problems

53. How many cups of sorbet are used to make 8 cups of punch?

54. Solve Percent Problems

56. Elise does not like sorbet, so she omits that ingredient and adds 5% of each of the other ingredients. How many cups of punch will she have is she uses 6 cups of orange juice?

57. Solve Percent Problems

58. Using what you know about percents, explain why a commercial that says “80% of dentists use this toothpaste” might be misleading.

59. Solve Percent Problems Using what you know about percents, explain why a commercial that says “80% of dentists use this toothpaste” might be misleading. Since only the percent is known, it is not known how many actual dentists use this toothpaste. They could have only surveyed 5 dentists and 4 chose this toothpaste.

60. Solve Percent Problems At a zoo, an Asian elephant eats roughly 5% of its body weight each day. If an Asian elephant eats 300 pounds of food a day, how much does it weigh?

61. Solve Percent Problems

62. Agenda Notes Homework – Homework Practice 2.8b Due Wed, Sept 23 Circle your answers Chapter 2 Test Tuesday, Sept 29 Accum Review 2 due Tuesday, Sept 29