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04/13/2010 Proportion and Percent #23

04/13/2010 Proportion and Percent #23. Warm Up : Answer as many as possible without looking at your notes. Then use your notes to finish. LT: I will apply my understanding of ratios to solve problems involving proportional relationships, including percent. Today’s Plan: -Warm-Up

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04/13/2010 Proportion and Percent #23

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  1. 04/13/2010 Proportion and Percent #23 Warm Up: Answer as many as possible without looking at your notes. Then use your notes to finish. LT: I will apply my understanding of ratios to solve problems involving proportional relationships, including percent. Today’s Plan: -Warm-Up -Percent Increase and Decrease -Assignment

  2. 04/13/2010 Proportion and Percent #23 White boards LT: I will apply my understanding of ratios to solve problems involving proportional relationships, including percent. Today’s Plan: -Warm-Up -Percent Increase and Decrease -Assignment

  3. Multi-Step Percent Problems A. Sarah bought a DVD player originally priced at $450 that was on sale for 20% off. What was the sale price? $450 20% First find 20% of $450. $450 0.20 = $90 20% = 0.20 The amount of decrease is $90. Think: The reduced price is $90 less than $450. $450 – $90 = $360Subtract the amount of decrease. The sale price of the DVD player was $360.

  4. Additional Example 3B: Percent Increase and Decrease B. Mr. Olsen has a computer business in which he sells everything at 40% above the wholesale price. If he purchased a printer for $85 wholesale, what will be the retail price? $85 40% First find 40% of $85. $85 0.40 = $34 40% = 0.40 The amount of increase is $34. Think: The retail price is $34 more than $85. $85 + $34 = $119Add the amount of increase. The retail price of this printer will be $119.

  5. Try This: Example 3A A. Lily bought a dog house originally priced at $750 that was on sale for 10% off. What was the sale price? $750 10% First find 10% of $750. $750 0.10 = $75 10% = 0.10 The amount of decrease is $75. Think: The reduced price is $75 less than $750. $750 – $75 = $675Subtract the amount of decrease. The sale price of the dog house was $675.

  6. Try This: Example 3B B. Barb has a grocery store in which she sells everything at 50% above the wholesale price. If she purchased a prime rib for $30 wholesale, what will be the retail price? $30 50% First find 50% of $30. $30 0.50 = $15 50% = 0.50 The amount of increase is $15. Think: The retail price is $15 more than $30. $30 + $15 = $45 Add the amount of increase. The retail price of the prime rib will be $45.

  7. 04/13/2010 Proportion and Percent #23 Worksheet LT: I will apply my understanding of ratios to solve problems involving proportional relationships, including percent. Today’s Plan: -Warm-Up -Percent Increase and Decrease -Assignment

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