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题库 / Prep2007E2-PS-88
In May Mrs. Lee's earnings were 60 percent of the Lee family's total income. In June Mrs. Lee earned 20 percent more than in May. If the rest of the family's income was the same both months, then, in June, Mrs. Lee's earnings were approximately what percent of the Lee family's total income?
64%
68%
72%
76%
80%
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全家revenue in May is A, Lee in may earned 0.6A, in June is 0.6A*1.2=0.72A, in June， family total is 0.4A+0.72A. 0.71/1.12=64%. If the rest of the family's income was the same both months, understand it carefully,
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