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Re: Mary's income is 60 percent more than Tim's income, and Tim' [#permalink]
13 Apr 2014, 13:21
Mary's income is 60 percent more than Tim's income: M = 1.6T Tim's income is 40 percent less than Juan's income: T = 0.6J To compare them, we will need to rationalise the ratio of the 3 individuals M : T : J
M : T : J => 1 : 1.6(1) : 0.6(1.6) = 1 : 1.6 : 0.96
Mary's income is 60 percent more than Tim's income, and Tim' [#permalink]
07 Dec 2014, 22:56
Mary's income is 60 percent more than Tim's income, and Tim's income is 40 percent less than Juan's income. What percent of Juan's income is Mary's income?
(A) 124% (B) 120% (C) 96% (D) 80% (E) 64%
Juan's income = 100 (assume); Tim's income = 60 (40 percent less than Juan's income); Mary's income = 96 (60 percent more than Tim's income).
Thus, Mary's income (96) is 96% of Juan's income (100).
Hi Bunuel! Really hoping you can help me understand something. I can not for the life of me make this equation work by setting Tim 100. I read your other comment regarding this, but I saw you wrote: Mary's income = "100/0.6". May I ask why you divided 0.6 rather than multiplied?
My quant is very weak so sorry if the answer is obvious.
EDIT: I just ran into another question and made a similar mistake. Therefore I think my question needs to be when should I use "amount*0.%" vs "amount/1.%"?
E.g why did you (and others here) go with "100/0.6" and not "100*0.60" since it says Tim's income is 60% of Juan's;