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During a certain month, $$20$$ percent of all the electricity used by a household was used by the water heater. The cost per kilowatt-hour of the electricity used by the water heater was half the cost per kilowatt-hour of the rest of the electricity used. For that month, the cost of the electricity used by the water heater was what fraction of the cost of the electricity used by the household?
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· 相关考点
2.4.1 百分比所属关系与倍数关系的描述 6.5.6 特值思维
2.4.1 百分比所属关系与倍数关系的描述
6.5.6 特值思维
以上解析由 考满分老师提供。
