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Do now. What is 125% of 10? Find 45% of $400 What number is 18.5% of 500?. Objective:. Lesson 7-8 Percent Proportion. Vocabulary. A percent proportion compares part of a quantity to the whole quantity, called the base , using a percent. Percent Proportion. is = x

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  1. Do now... • What is 125% of 10? • Find 45% of $400 • What number is 18.5% of 500?

  2. Objective: Lesson 7-8 Percent Proportion

  3. Vocabulary A percent proportion compares part of a quantity to the whole quantity, called the base, using a percent.

  4. Percent Proportion is = x of 100

  5. What percent of 6 is 3? is = x of 100 3 = x 6 100 300 ÷ 6 = 50 50 %

  6. What number is 50% of 6? is = x of 100 x = 50 6 100 300 ÷ 100 = 3 3

  7. 3 is 50% of what number? is = x of 100 3 = 50 x 100 300 ÷ 50 = 6 6

  8. What percent of 60 is 15? is = x of 100

  9. What number is 12% of 72? is = x of 100

  10. 75 is 20% of what number? is = x of 100

  11. Real World Application A paperback book originally priced at $12.50 is on sale for $7.50. What percent of the original cost is the sale price? $7.50 = x $12.50 100 750 ÷ 12.50 = 60 60%

  12. Let's review Choose the problem that can be solved by using 8 = 16 b 100 a. What number is 16% of 8? b. 8 is 16% of what number?

  13. Check for Understanding text page 325 Numbers 7-17 odd

  14. Homework: page 325 #'s 8-20 evens only

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