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Chewing Gum Practice Problem: The average price of chewing gum in 2004 was $0. 25. What is the price now? Increased by 20% $0. 30 $0. 25 Chewing Gum Price, 2004 Increased by 35% $0. 34

Corn Flakes In 1984, the price of a 12 oz. box of Kellogg’s® Corn Flakes was $0. 89. What was the price in 2008? Increased by 235% $2. 98 $0. 89 Corn Flakes Price, 1984 Increased by 105% $1. 82

Regular Gasoline In July 1999, the price of a gallon was $1. 12. Find the percent change from July 1999 to July 2008. $2. 83 in 2008 153% $1. 12 Regular Gasoline Price, July 1999 $4. 05 in 2008 262%

Pound of Oreos In 1922, the cost of a pound of Oreos was $0. 32. What was the cost in 2004? Increased by 1055% $3. 70 $0. 32 Oreos Price, 1922 Increased by 834% $2. 99

Laptop Computer You can now buy a laptop for 14% of the cost of a 1981 laptop. What was the cost in 1981? $249 $1, 779 14% of the original price Laptop Price, 1981 $430 $3, 071

College Tuition In 2009, the average yearly cost of a four-year university was $6, 585. What was the cost in 1970? 19. 1% of the 2009 price $1, 258 $6, 585 Cost of a Four-Year University, 2009 26. 4% of the 2009 price $1, 738

Postage In May 2009, the price of stamps was $0. 44. Find the percent increase from 1978 to 2009. $0. 25 in 1978 76% $0. 44 Price of First-Class Postage, 2009 $0. 15 in 1978 193%