nelnadi wrote:
A certain juice manufacturer increased the number of ounces in Product N by 25 percent but did not change the price. What was the resulting percent decrease in the price per ounce of Product N?
(A) 10%
(B) 20%
(C) 25%
(D) 30%
(E) 35%
Before the increase:
Since 25% = 1/4, let the volume = 4 ounces.
After the increase:
Since the number of ounces increases by 1/4, the new volume = 4 + (1/4)4 = 5 ounces.
Let the price = the LCM of 4 and 5 = $20.
Before the increase:
Price per ounce = 20/4 = $5 per ounce
After the increase:
Price per ounce = 20/5 = $4 per ounce.
Percent decrease in the price = (difference between the prices)/(higher price) * 100 = 1/5 * 100 = 20%.
The correct answer is
B.
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