有关求百分比,英语题目The administration fee for the American Mathematics competition was US4.00dollars for each student. The organiser collected S5.00dollars from each student.If the exchange rate was S1.00dollar=US1.32dollars,calculate the

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Because S5.00=US5*1.32=US6.6
So earn each student = US6.6-US4 = US2.6
percentage earned = 2.6/4*100%=65%

每个学生应缴纳的竞赛费是4美元
而主办竞赛的组织收费是5*1.32=6.6美元（因为S1.00dollar=US1.32dollars）
所以主办方可以净赚6.6-4=2.6美元
注:你的这些什么符号不是很能看得懂，所以我就将S1.00dollar看作另一种币别

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