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In 1980, the cost ofp pounds of potatoes was d dollars. In 1990, the cost of 2p
In 1980, the cost ofp pounds of potatoes was d dollars. In 1990, the cost of 2p
游客
2025-02-24
21
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问题
In 1980, the cost ofp pounds of potatoes was d dollars. In 1990, the cost of 2p pounds of potatoes was d/2 dollars. By what percent did the price of potatoes decrease from 1980 to 1990?
选项
A、25%
B、50%
C、75%
D、100%
E、400%
答案
C
解析
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