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The estimated savings rate of Country X decreased by 10 %

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Joined: 28 May 2009
Posts: 155
Location: United States
Concentration: Strategy, General Management
GMAT Date: 03-22-2013
GPA: 3.57
WE: Information Technology (Consulting)
Followers: 4

Kudos [?]: 131 [0], given: 91

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The estimated savings rate of Country X decreased by 10 % [#permalink] New post 06 Feb 2013, 13:33
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Difficulty:

  25% (medium)

Question Stats:

80% (02:12) correct 20% (01:47) wrong based on 40 sessions
The estimated savings rate of Country X decreased by 10 percent over the same time period that the estimated savings rate of Country Y increased by 25 percent. The original estimated savings rate of Country X was what percent of the original savings rate of Country Y?

(1) The estimated savings rate of Country X decreased to 1.8%.
(2) The estimate savings rate of Country Y increased to 3.75%.

Source: Gmat Hacks 1800
[Reveal] Spoiler: OA

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Re: The estimated savings rate of Country X decreased by 10 % [#permalink] New post 06 Feb 2013, 22:40
Expert's post
Let estimated savings rate for Country X = 100X and similarly for country Y = 100Y

Now, over the same time period, the respective savings rate change as :

For Country X = 90X and for Country B = 125Y.

Need to find out the ratio (X/Y)x100.

From fact statement 1, 90X = 1.8; we get a value for X.But no value for Y. Insufficient.

From fact statement 2, 125Y = 3.75; we get a value for Y. But no value for X. Insufficient.

Both together, we get the value of the ratio(X/Y). Sufficient.

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Re: The estimated savings rate of Country X decreased by 10 %   [#permalink] 06 Feb 2013, 22:40
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