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# Quantitative comparision

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Intern
Joined: 14 Oct 2017
Posts: 1

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25 Oct 2017, 02:17
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

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Can anyone tell me
a!=b
Quantity A = (a-b)/(b-a) :::: Quantity B=1

Manhattan 5lb answer => (a-b)/-(a-b) = -1 so B is correct (Understood)

but why can't we do this like

(a-b)/(b-a) [?] 1
multiplying b-a on both sides
(a-b) [?] (b-a)
(a-b) [?] -(a-b)
dividing by (a-b)
1 > -1
A is greater according to this method can i know why i cant do this like

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

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Math Expert
Joined: 02 Sep 2009
Posts: 49300

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27 Oct 2017, 12:08
nikkikoneru wrote:
Can anyone tell me
a!=b
Quantity A = (a-b)/(b-a) :::: Quantity B=1

Manhattan 5lb answer => (a-b)/-(a-b) = -1 so B is correct (Understood)

but why can't we do this like

(a-b)/(b-a) [?] 1
multiplying b-a on both sides
(a-b) [?] (b-a)
(a-b) [?] -(a-b)
dividing by (a-b)
1 > -1
A is greater according to this method can i know why i cant do this like

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--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________
Re: Quantitative comparision &nbs [#permalink] 27 Oct 2017, 12:08
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