Gmat prep problem

[Chaitanya_1986]

Please find the problem attched in image below.

I got answer as 72%......But OA is 64 %. Could any one explain how???

[GMATGuruNY]

In May, Mrs. Lee's earnings were 60% of the Lee family's total income. In June, Mrs. Lee earned 20% 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 ?

a. 64
b. 68
c .72
d. 76
e. 80

OA A

We can plug in our own values that follow the conditions in the problem.

Family income in May = 100.
Mrs. Lee in May = .6*100 = 60.
Rest of the family = 100-60 = 40.
Mrs. Lee in June = 1.2(60) = 72.
Rest of the family is unchanged = 40.
Total family income in June = 72+40 = 112.
Percentage for Mrs. Lee in June = 72/112 * 100 ≈ 64%.

The correct answer is A.

[Chaitanya_1986]

Thanks Mitch...........I got my mistake....I took 72/100....forgot to add the remaining 40 to 72.....


Thanks for the reply....