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Lesson Menu Five-Minute Check (over Lesson 5–7) Main Idea and Vocabulary Key Concept: Percent of Change Example 1:Real-World Example: Find Percent of Change Example 2:Real-World Example: Find Percent fo Change Example 3:Find the Selling Price Example 4:Find the Sale Price

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Main Idea/Vocabulary percent of change percent of increase percent of decrease markup selling price discount Find and use the percent of increase or decrease.

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Example 1 HOMES The Neitos bought a house several years ago for $120,000. This year, they sold it for $150,000. Find the percent of change. State whether the change is an increase or a decrease. Step 1The amount of change is 150,000 – 120,000 = 30,000. Find Percent of Change Step 2percent of change

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Example 1 = 0.25Divide. Answer: The new amount is more than the original. The percent of increase is 25%. Find Percent of Change The amount of change is 30,000. The original amount is 120,000. Step 3The decimal 0.25 written as a percent is 25%. So, the percent of change is 25%.

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1.A 2.B 3.C 4.D Example 1 A.12%; decrease B.15%; increase C.18%; decrease D.21%; increase CLUBS Last year, Cedar Park Swim Club had 340 members. This year, they have 391 members. Find the percent of change. State whether the percent of change is an increase or a decrease.

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Example 2 SCHOOLS Johnson Middle School had 240 students last year. This year, there are 192 students. Find the percent of change. State whether the percent of change is an increase or a decrease. Find Percent of Change Step 1The amount of change is 240 – 192 = 48. Step 2percent of change The amount of change is 48. The original amount is 240. = 0.20 Divide.

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Example 2 Step 3The decimal 0.20 written as a percent is 20%. Answer: The percent of change is 20%. Since the new amount is less than the original, it is a percent of decrease. Find Percent of Change

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1.A 2.B 3.C 4.D Example 2 A.25%; increase B.25%; decrease C.35%; increase D.35%; decrease CARS Meagan bought a new car several years ago for $14,000. This year she sold the car for $9,100. Find the percent of change. State whether the percent of change is an increase or a decrease.

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Example 3 Find the Selling Price MARKUP Shirts bought by a sporting goods store cost them $20 per shirt. They want to mark them up 40%. What will be the selling price? Method 1 Find 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. part = percent ● whole m = 0.4 ● 20Write the percent equation. m = 8Multiply. Add the markup $8 to the cost of each shirt to find the selling price. $20 + $8 = $28

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Example 3 Find the Selling Price Method 2 Find 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. part = percent ● whole Answer: The selling price of the shirts for the customer is $28. p = 1.4 ● 20Write the percent equation. p = 28Multiply.

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1.A 2.B 3.C 4.D Example 3 A.$12.85 B.$13.10 C.$13.50 D.$14.25 MARKUP Silk flowers bought by a craft store cost them $10 per dozen. They want to mark them up 35 percent. What will be the selling price?

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Example 4 SHOPPING A computer usually sells for $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. part = percent ● whole Find the Sale Price d = 0.3 ● 1,200Write the percent equation. d = 360Multiply. Subtract the amount of the discount from the original price to find the sale price. $1,200 – $360 = $840

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Example 4 Method 2 Find 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. part = percent ● whole Answer: The sale price of the computer is $840. Find the Sale Price s = 0.7 ● 1,200Write the percent equation. s = 840Multiply.

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1.A 2.B 3.C 4.D Example 4 A.$21.65 B.$22.40 C.$23.15 D.$23.45 SHOPPING A DVD sells for $28. This week it is on sale for 20% off. What is the sale price?

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1.A 2.B 3.C 4.D Five Minute Check 1 A.20 B.40 C.80 D.125 Find 40% of 50. Use the percent equation. (over Lesson 5-7)

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1.A 2.B 3.C 4.D Five Minute Check 2 What percent of 72 is 30? Use the percent equation. (over Lesson 5-7) A. B. C.140 D.240

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1.A 2.B 3.C 4.D Five Minute Check 3 13 is 3% of what number? Use the percent equation. (over Lesson 5-7) A. B. C. D.

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1.A 2.B 3.C 4.D Five Minute Check 4 A.40% B.83% C.120% D.480% 240 is what percent of 200? Use the percent equation. (over Lesson 5-7)

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1.A 2.B 3.C 4.D Five Minute Check 5 A.$5.35 B.$12.95 C.$39.6 D.$61.86 How much will a $4.95 combo meal cost after an 8% sales tax is added? (over Lesson 5-7)

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1.A 2.B 3.C 4.D Five Minute Check 6 Fifteen out of 20 students in a class are boys. What percent of the class are girls? (over Lesson 5-7) A.5% B.25% C. % D.75%

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