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Lesson 6-7 Pages 298-302

Lesson 6-7 Pages 298-302. Using Percent Equations. Lesson Check 6-6. What you will learn!. How to solve percent problems using percent equations. How to solve real-life problems involving discount and interest. Vocabulary. What you really need to know!.

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Lesson 6-7 Pages 298-302

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  1. Lesson 6-7Pages 298-302 Using Percent Equations Lesson Check 6-6

  2. What you will learn! • How to solve percent problems using percent equations. • How to solve real-life problems involving discount and interest.

  3. Vocabulary

  4. What you really need to know! In a percent equation, the percent is written as a decimal.

  5. What you really need to know! % of BASE = PART The word “ of ”means multiply!

  6. What you really need to know! The number after the word “of” is the base! The number near the word “is” is the part!

  7. Example 1: Find 38% of 22. % x BASE = PART 38% x 22 = PART 0.38 x 22 = PART 8.36 = PART

  8. Example 2: 19 is what percent of 25? % x BASE = PART % x 25 = 19 % = 19 ÷ 25 76% % = 0.76

  9. Example 3: 84 is 16% of what number? % x BASE = PART 16% x BASE = 84 0.16 x BASE = 84 BASE = 84 ÷ 0.16 BASE = 525

  10. Example 4: The regular price of a ring is $495. It is on sale at a 20% discount. What is the sale price of the ring? 20% x $495 = $99 $495 - $99 = $396

  11. Example 5: Suppose you invest $2,000 at an annual interest rate of 4.5%. How long will it take to earn $495? I = prt

  12. I = prt I is interest p is principal r is annual interest rate t is time in years

  13. Example 5: Suppose you invest $2,000 at an annual interest rate of 4.5%. How long will it take to earn $495? 495 = 2,000 • 0.045 • t 5.5 years = t

  14. Page 300 Guided Practice #’s 4-11

  15. Read: Pages 298-300 with someone at home and study examples!

  16. Homework: Pages 301-302 #’s 12-40 even #’s 44-61 Lesson Check 6-7

  17. Page 738 Lesson 6-7

  18. Lesson Check 6-7

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