GMAT Prep question....

[supratims]

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 rest of the family's income did not change, then, in June, Mrs Lee's earnings were approximately what percent of the Lee family's total income ?

1. 64%
2. 68%
3. 72%
4. 76%
5. 80%

Answer : I solve it in following way: Let Family earning be 100. So in May Mrs Lee will earn 60. In june, Mrs Lee will earn 20% more, so 60+20%of 60 = 72. Since family warning stays at 100, in June Mrs Lee earns 72% of that. Hence 3 is the answer.
Hence C). But OA is A) :(

Any thoughts ?

[dilipgmat]

Well Apparently.. There is a small mistake in your concept.

The Rest of the family income stay the same ,i.e = 100-60=40

Mrs Lee's Income increases by 20%=60+12=72

Therefore, Total Family earnings = Mrs Lee + Rest of the family=72+40=112

Percentage=(72/112)*100=63.7%=appr 64%

Hope this helps!!!

[supratims]

thanks, it helped. i need to follow the instructions more carefully now on.
have a gmat tomorrow ;)