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MORE PROBLEMS INVOLVING PERCENT INCREASE AND DECREASE
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EXAMPLES:
Question: Suppose the price of an item increases by 19%, and then decreases by 30%.
What is the resulting percent increase or decrease?
Answer: (0.7)(1.19x) = 0.83x; 17% decrease
Question: Suppose the price of an item decreases by 50%, and then increases by 50%.
What is the resulting percent increase or decrease?
Answer: (1.5)(0.5x) = 0.75x; 25% decrease
Question: Suppose the price of an item increases by 50%, and then decreases by 50%.
What is the resulting percent increase or decrease?
Answer: (0.5)(1.5x) = 0.75x; 25% decrease
Question: Suppose the price of an item increases by 30%, and then decreases by 10%.
What is the resulting percent increase or decrease?
Answer: (0.9)(1.3x)= 1.17x; 17% increase
Question: Suppose the price of an item increases by 50%, and then increases by 50% again.
What is the resulting percent increase or decrease?
Answer: (1.5)(1.5x)= 2.25x; 125% increase
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All answers are rounded to the nearest whole number.