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?

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64%

Correct

68%

72%

76%

80%

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Official Explanation

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Let total income of the family be $100.

In May Mrs Lee's earnings were 60 percent = $60.

Rest of the family's earnings = $40.

In June family's earnings did not change = $40.…

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What this question tests

What it tests

Your ability to apply GMAT math concepts to solve a multi-step problem quickly and accurately. At the 705-805 level, accuracy and speed both matter.

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Overcomplicating the setup — most GMAT problems reward a direct, organized approach over brute calculation.