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9/10-8/9

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9/10-8/9 [#permalink] New post 07 Jun 2017, 00:48
Expert's post
00:00

Question Stats:

90% (00:22) correct 10% (00:06) wrong based on 30 sessions


Quantity A
Quantity B
\(\frac{9}{10}-\frac{8}{9}\)
\(\frac{8}{9}-\frac{9}{10}\)



A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

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Re: 9/10-8/9 [#permalink] New post 07 Jun 2017, 09:25
Expert's post
Carcass wrote:


Quantity A
Quantity B
\(\frac{9}{10}-\frac{8}{9}\)
\(\frac{8}{9}-\frac{9}{10}\)



A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.


Let's convert the fractions to decimals and estimate...

We get:
Quantity A: 0.9 - 0.888
Quantity B: 0.888 - 0.9

NOTE: We need not actually calculate anything. Just notice that 0.9 is GREATER THAN 0.888
So, we get:
Quantity A: some POSITIVE number
Quantity B: some NEGATIVE number

Answer:
[Reveal] Spoiler:
A


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Re: 9/10-8/9   [#permalink] 07 Jun 2017, 09:25
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9/10-8/9

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