Diana bought a stereo for $530,which was the retail price plus a 6 percent sales tax,How much money could she have saved if she had bought the stereo at the same retail price in neighboriing state where she would have paid a sales tax of 5 percent ? 计算方法为;530-530(1+5%)/1.06=5 my question is :我计算的结果为530-530(1+5%)/1.06=>530(1-(1+5%)/1.06=〉530*（1-0.995.3，同时5.3也在答案里，为何钱永强选择5呢？我的计算问题出现在哪呢？
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发表于 2006-10-31 13:49:00
