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In a store, $$\frac{2}{3}$$ of the employers take care of the customers and $$\frac{1}{5}$$ of the employers wash dishes. What is the proportion of employers who do not take care of the customers or wash dishes?
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· 相关考点
2.1.1 分数的加减乘除运算
以上解析由 考满分老师提供。
