Percent Increase and Decrease. Language Goal  Students will be able to verbally express percent increase and decrease. Math Goal  Students will be able.

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Presentation transcript:

Percent Increase and Decrease

Language Goal  Students will be able to verbally express percent increase and decrease. Math Goal  Students will be able to find percent increase and decrease. Essential Question  What are instances where you may encounter both percent increase and decrease?

 Percent Change: an increase or decrease given as a percent of the original amount.  Percent Increase: an increase given as a percent of the original amount.  Percent Decrease: an decrease given as a percent of the original amount.

 Discount: an amount by which an original price is reduced.  Markup: the amount by which a wholesale cost is increased.

 Find each percent change. Tell whether it is a percent increase or decrease. A. From 25 to 49B. from 50 to 45 C. from 200 to 110

A. Find the result when 30 is increased by 20%. B. Find the result when 65 is decreased by 80%.

 Discount = % of original price  Final price = original price – discount  Markup = % of wholesale cost  Final price = wholesale cost + markup

 A. Admissions to the museum is $8. Students receive a 15% discount. How much is the discount? How much do students pay?  Method 1:  Method 2:

 B. Christo used a coupon and paid $7.35 for a pizza that normally costs $ Find the percent discount.

 C. A $220 bicycle was on sale for 60% off. Find the sale price.

 D. Ray paid $12 for a $15 T-shirt. What was the percent discount?

 A. Kaleb buys necklaces at wholesale cost of $48 each. He then marks up the price by 75% and sells the necklaces. What is the amount of the markup? What is the selling price?  Method 1:  Method 2:

 B. Lars purchased a daily planner for $32. The wholesale cost was $25. What was the percent markup?