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Learn how to find sale prices by applying discounts and markups using percentages in various real-life examples.

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  1. Lesson Menu Main Idea and New Vocabulary Example 1: Find the Sale Price Example 2: Find the Selling Price Example 3: Find the Total Cost

  2. Apply percents to find discount, markup, and sales tax. • discount • markup • selling price • sales tax Main Idea/Vocabulary

  3. Find the Sale Price SHOPPING The regular price for a computer is $1,200. This week, it is on sale for 30% off. What is the sale price? Method 1 Find the amount of the discount first. The percent is 30%, and the whole is 1,200. We need to find the amount of the discount, or the part. Let d represent the amount of discount. d = 0.30 ● 1,200 Write the percent equation. d = 360 Multiply. Subtract the amount of the discount from the original price to find the sale price. $1,200 – $360 = $840 Example 1

  4. Find the Sale Price Method 2Find the percent paid first. If the amount of the discount is 30%, the percent paid is 100% – 30% or 70%. Find 70% of $1,200. Let s represent the sale price. s = 0.70 ● 1,200 Write the percent equation. s = 840 Multiply. Answer: The sale price of the computer is $840. Example 1

  5. SHOPPING The regular price for a video game system is $250. This week, it is on sale for 20% off. What is the sale price? A. $50 B. $200 C. $225 D. $230 Example 1 CYP

  6. Find the Selling Price CLOTHING The wholesale cost for shirts bought by a sporting goods store is $20 per shirt. The shirts will be marked up 40%. What will be the selling price? Method 1Find the amount of the markup first. The whole is $20. The percent is 40%. You need to find the amount of the markup, or the part. Let m represent the amount of the markup. m = 0.40 ● 20 Write the percent equation. m = 8 Multiply. Add the markup $8 to the store’s cost $20 to find the selling price. $8 + $20 = $28 Example 2

  7. Find the Selling Price Method 2Find the total percent first. The customer will pay 100% of the store’s cost plus an extra 40% of the cost. Find 100% + 40% or 140% of the store’s cost. Let p represent the price. p = 1.40 ● 20 Write the percent equation. p = 28 Multiply. Answer: The selling price of the shirts is $28. Example 2

  8. PETS The wholesale cost for guinea pig treats is $2.60 per box. The treats will be marked up 35% at the store. What will be the selling price? A. $1.69 B. $2.95 C. $3.51 D. $3.95 Example 2 CYP

  9. Find the Total Cost MUSIC A stereo that costs $120 is on sale for 12% off with a sales tax of 6.5%. What is the total cost of the stereo? Step 1Find the price of the stereo after the discount. Let d represent the total discount. part = percent ● whole d = 0.12 ● 120 Write the percent equation. d = 14.4 Multiply. Example 3

  10. Find the Total Cost Subtract the discount from the original price to find the sale price. $120 – $14.40 = $105.60 Step 2Find the amount of the sales tax. Let t represent the sales tax. part = percent ● whole t = 0.065 ● 105.60 Write the percent equation. t  6.86 Multiply. Example 3

  11. Find the Total Cost Add the sales tax to the sale price to find the total price. $105.60 + $6.86 = $112.46 Answer: The total cost of the stereo is $112.46. Example 3

  12. ENTERTAINMENT A trampoline that costs $200 is on sale for 5% off with a sales tax of 7%. What is the total cost of the trampoline? A. $190.00 B. $203.30 C. $208.65 D. $214.00 Example 3 CYP

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