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Percent of Change. Try This! A CD's original price was $12.99. It is now on sale for $10.99. What is the percent of change?

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Presentation on theme: "Percent of Change. Try This! A CD's original price was $12.99. It is now on sale for $10.99. What is the percent of change?"— Presentation transcript:

1 Percent of Change

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5 Try This! A CD's original price was $12.99. It is now on sale for $10.99. What is the percent of change?

6 Try This! A student's first test grade was 60. The second test grade was an 85. What was the percent of change?

7 41The number of students who attended FHS in 2010 was 1405. In 2011, 1380 students attended FHS. What was the percent of change in student enrollment?

8 43Find the percent of change. Original price: $80 Sale price: $50

9 44A stereo, originally priced at $360, is on sale for $200. What is the percent of change?

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11 When finding a discount, there are two different methods you can use.

12 Example: A $50 sweater is on sale for 20% off. Calculate the sale price. (Discount) (Sale price) (Percent you pay) (Sale price)

13 A manager wants to provide a 30% discount for everything in his store. Find the sale price of a $25 sweater. Using either method, the answer is $17.50 (Discount) (Sale price) (Percent you pay) (Sale price) Click to view Method 1Click to view Method 2 Click to view answer

14 The manager has pants, priced at $45, that he needs to mark down 35%. What will be the sale price of the pants? The pants are on sale for $29.25 (Discount) (Percent you pay) (Sale price) Click to view Method 1Click to view Method 2 Click to view answer

15 Mark wants to purchase a stereo that is on sale, if he is saving at least 30%. The stereo's original cost is $425. What is the most that he is willing to pay for the stereo? (Discount) (Sale price) (Percent you pay) (Sale price) He is willing to pay $297.50 for the stereo. Click to view Method 1 Click to view Method 2 Click to view answer

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19 A car costs $23,500. How much sales tax will the customer pay? 23,500(0.07) = $1645 What will the customer pay altogether for the car? 23,500 + 1645 = $25,145 The total cost of the car, including tax, can be calculated as follows: 23,500 +.07(23,500) = 25,145 or 23,500(1.20) = 25,145


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