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Founder  Joined: 18 Apr 2015
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Of the following, which is the best approximation of the per [#permalink]
Expert's post 00:00

Question Stats: 77% (00:59) correct 22% (00:53) wrong based on 9 sessions
Attachment: health.jpg [ 213.31 KiB | Viewed 547 times ]

Of the following, which is the best approximation of the percent increase in the national health expenditure per capita from 1981 to 1982 ?

(A) 35%

(B) 30%

(C) 20%

(D) 10%

(E) 5%
[Reveal] Spoiler: OA

_________________ Director  Joined: 07 Jan 2018
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Re: Of the following, which is the best approximation of the per [#permalink]
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From the per capita graph in 1981 the amount is approximately 380 and in 1982 the amount was approximately 420.
% increase = $$\frac{420-380}{420} * 100$$ = 9.5% which is approximately 10%
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Director Joined: 09 Nov 2018
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Re: Of the following, which is the best approximation of the per [#permalink]
amorphous wrote:
From the per capita graph in 1981 the amount is approximately 380 and in 1982 the amount was approximately 420.
% increase = $$\frac{420-380}{420} * 100$$ = 9.5% which is approximately 10%

we should divide by 420 or 380.
Manager Joined: 04 Feb 2019
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Re: Of the following, which is the best approximation of the per [#permalink]
Expert's post
AE wrote:
amorphous wrote:
From the per capita graph in 1981 the amount is approximately 380 and in 1982 the amount was approximately 420.
% increase = $$\frac{420-380}{420} * 100$$ = 9.5% which is approximately 10%

we should divide by 420 or 380.

We divide by 420, the original number.

If you think about it, 420 - 380 = 40, and that's the actual increase that occured.

So we're left with $$\frac{40}{420}$$, which tells us what fraction of the original number, 420, the increase, 40, is. So $$\frac{40}{420}$$ is approximately equal to $$\frac{9.5}{100}$$, or 9.5%. So, the increase of 40 is equal to an increase of 9.5% of our original number. Re: Of the following, which is the best approximation of the per   [#permalink] 28 Feb 2019, 21:29
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