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Machines A and B each assembled 3,000 metal clips in 15 hours and 12 hours, respectively, working alone at their constant rates. On Monday, working simultaneously at their respective constant rates, the two machines assembled a total of n clips in x hours. The next day, machine A was modified so that its constant rate decreased by 25 percent. If the two machines worked simultaneously at their respective constant rates for x hours after the modification of machine A, then the total number of clips that they assembled in x hours was approximately what percent less than it was the day before?
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· 相关考点
2.5.2 工作效率题 2.4.2 百分比多少关系的描述
2.5.2 工作效率题
2.4.2 百分比多少关系的描述
以上解析由 考满分老师提供。
