LUANDATO wrote:A baseball card decrease in value 20% in its first year and 10% in its second year. What was the total percent decrease of the card's value over the two years?
A. 28%
B. 30%
C. 32%
D. 36%
E. 72%
Let the original value of the card = 100.
After a 20% decrease, the card = 100 - (20% of 100) = 100 - 20 = 80.
After an additional 10% decrease, the card = 80 - (10% of 80) = 80 - 8 = 72.
Total decrease = 100 - 72 = 28.
Since the card loses $28 of its original $100 value, the total percent decrease = 28/100 = 28%.
The correct answer is
A.
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