the ratio of rate of earning $2.75 for 5 days' work to the rate of earning $2.1 for 4 days' work is close to:
I have NEVER seen an official math question ask anything like a "close to" question of this sort. The exact ratio here is, of course, 22/21 --- I could imagine the GMAT asking for that. I could also imagine an approximation question --- if they made this much in this period, how much would they make in this larger period
? Finally, I don't think the GMAT would ever expect test takers to recognize without a calculator that, for example, 22/21 is closer to 12/11 than it is to 5/4.
I believe this question has in it, as it were, the seeds of one or two very good questions, but with all due respect, in its current form, I don't believe it would ever appear on the GMAT.
Magoosh Test Prep