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[Problem Solving]
试题详情
题目：
The charge for a single room at Hotel P is 25 percent less than the charge for a single room at Hotel R and 10 percent less than the charge for a single room at Hotel G . The charge for a single room at Hotel R is what percent greater than the charge for a single room at Hotel G ?
选项:
A、15%
B、20%
C、40%
D、50%
E、150%
答案:
B
提问：
老师您好，这种比例题一直做不对，能不能介绍一下方法？多谢~
解答：
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