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Do Now 2/20/14 Take out your HW from last night.
6.6 Puzzle Time Practice Copy HW in your planner. Text p. 248, #7-16 all, 19, 20 In your notebook, put the following heading on the top of a new page. Section 6.4 “Percent of Change”
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Homework Puzzle Time 6.6 1) $59.40 2) $57.60 3) $53.10 4) $97.50
5) $68.25 6) $58 7) $24.50 8) $42 9) $44 10) $36 11) $3.12 12) $2842 13) $11.99 14) $ 15) $735 “What Does A Monster Say When Introduced?” PLEASED TO EAT YOU
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Objective SWBAT solve problems involving percent of change
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Section 6.4 “Percent of Change”
the amount that a number increases or decreases written as a percent amount of change original amount Percent of change = x 100 If the amount goes up, it is a PERCENT of INCREASE. If the amount goes down, it is a PERCENT of DECREASE.
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Amount of change Original amount x 100 Before: 30 After: 45
Find the percent of increase or decrease (round to the nearest tenth of a %). Before: After: 45 50% increase Before: After: 46 60% decrease Before: After: 146 25.9% increase
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≈0.181818 actual change original amount 200 1100 = ≈18.2% increase
The enrollment of Howell Middle School South in was 1100 students. In the year the enrollment was 1300 students. What is the percent of increase or decrease between the two years? From to the enrollment increased by 200, therefore our answer is a percent of increase. : : – 1100 change: ≈ actual change original amount 200 1100 Percent of increase = = ≈18.2% increase
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amount of change original amount 0.2 million 2 million =0.1 =10%
There were 2.2 million computers used in public schools in 1991 and 2 million in Find the percent of increase. From 1990 to 1991 the number of computers used increased by 0.2 million or 200,000. 1991: million 1990: million change: million or 200,000. amount of change original amount 0.2 million 2 million =0.1 Percent of increase = =10% increase
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Scenario 3: amount of change original amount $9.20 $307.99 =0.0298711
If a customer brings an ad that shows a competitor is selling an item for less, you are permitted to match the competitor's price as long as the percent of discount is 15% or less. a). The newest Blu-ray disc player is listed at $ You notice on your way to work that the same player is for sale at another store for $ Would you be allowed to match this store's price if asked? Explain. amount of change original amount $9.20 $307.99 = Percent of decrease = ≈3% decrease Yes, you would be permitted to match the price of $
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Scenario 3: =$59.97 x 5% shipping = $62.97 amount of change
If a customer brings an ad that shows a competitor is selling an item for less, you are permitted to match the competitor's price as long as the percent of discount is 15% or less. b). The store sells a wireless Internet router for $ A customer has printed out a page from the Internet that shows the same router for $59.97 plus 5% shipping and handling. Can you match this price? Explain. =$59.97 x 5% shipping = $62.97 amount of change original amount $11.78 $74.75 = … Percent of decrease = ≈16% decrease No, you would not be permitted to match the price on the Internet because the discount is greater than 15%.
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Percent Applications There were about 198,000 spectators at the NCAA Final Four in The number of spectators increased by about 12% from 1995 to About how many spectators were there in 2002? Spectators in 2002 = Spectators in 1995 + Amount of increase = 198,000 + = 198,000 + 23,760 = 221,760
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Percent Applications In 1983, the average price of CD was $ By 2000, the average price had decreased by 34.8%. What was the average price of a CD in 2000? Price in 2000 = Price in 1983 - Amount of Decrease = $21.50 - = $21.50 - 7.48 = $14.02
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24 Homework Text p. 248, #7-16 all, 19, 20
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