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P ERCENT I NCREASE OR D ECREASE

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H OW CAN YOU USE PERCENTS TO SHOW CHANGE ? Example: To show what percent the prices increase or decrease. X = Difference between two amounts 100 Original Number

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E XAMPLE 1 Prices at a local electronic store have changed over the years. By what percent did the prices increase or decrease for the stereo system? X = Difference between two amounts 100 Original Number X = 37 100 98.95 98.95X = 3700 X 37.4% Item19942004 Stereo System $98.95$135.9 5 Cell Phone $245$159

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E XAMPLE 2 What percent did the prices change for the Cell phone? X = Difference between two amounts 100 Original Number X = 86 100 245 245X = 8,600 X35.1 Item19942004 Stereo System $98.95$135.95 Cell Phone $245$159

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John David is at the mall and wants to buy a T-shirt that he saw last month for $20. The T-shirt now costs $25. Find the percent increase or decrease. X = 5 100 20 20X = 500 X25% Increase

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R AGS TO R ICHES …. http://www.quia.com/rr/230204.htmlwww.quia.com/rr/230204.html

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1.) Joznel wants to buy a jacket at Justice for $72.00. The jacket is now on sale for $54.00. What is the percent decrease?

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2.) Izzi wants to buy a pair of shoes that originally cost $48. The shoes are on sale and now cost $68. What is the percent increase?

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3.) The pair of basketball sneakers Ross wants to buy is on sale for $114. The original price of the sneakers were $120. What is the percent increase?

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4.) Michael wants to buy a authentic Phillies jersey for $189.00. The jersey is now on sale for $159.00. What is the percent decrease?

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5.) There are 14 people in class on Tuesday. There are 20 people in class on Wednesday. What is the percent increase?

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6.) Kayla needs a new tennis racket. The price of the racket is $65.99. The racket is on sale for $52.95. What is the percent decrease?

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7.) Ms. D is shopping for earrings at Kohls. She finds a pair for $36.95. They are on sale for $19.99. What is the percent decrease?

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8.) Layne is at Pacific Sunwear and wants to buy a pair of pants she saw last week for $32.50. The price of the pair of pants is now $45.50. What is the percent increase?

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9.) On Monday, only 15 students brought their textbook to class. On Tuesday, 22 students brought their textbooks to class. What is the percent increase?

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10.) Ms. Nelson also works at Express and receives a store discount. She bought a $75 jacket for $60. What is the percent decrease?

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11.) Megan wants to a ticket for the upcoming Justin Bieber concert. The original price of the concert is $48. The ticket price increased due to popular demand and is now $60. What is the percent increase?

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12.) Mrs. Heywood normally gets wonton soup for lunch. The original price is $4.50. The Chinese restaurant just increased their prices and the soup now costs $5.50. What is the percent increase?

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