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PROBLEMS INVOLVING PERCENT INCREASE AND DECREASE
Jump right to the exercises!
Here, you will practice solving problems involving percent increase and decrease.
You may use a calculator for these exercises.
EXAMPLES:
Question: Suppose an item costs $50.
If the price increases by 19%, and then decreases by 30%, the new price is:
Answer: (0.7)(1.19)($50) = $41.65
Question: Suppose an item costs x .
If the price decreases by 50%, and then increases by 50%, the new price is:
Answer: (1.5)(0.5)x = 0.75x
Question: Suppose an item costs x .
If the price increases by 50%, and then increases by 50%, the new price is:
Answer: (1.5)(1.5)x = 2.25x
Question: Suppose an item costs $100.
If the price decreases by 50%, and then decreases by 50%, the new price is:
Answer: (0.5)(0.5)($100) = $25.00
On this exercise, you will not key in your answer.
However, you can check to see if your answer is correct.
All answers are rounded to two decimal places.