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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: 76% (01:05) correct 23% (01:08) wrong based on 43 sessions
Attachment: health.jpg [ 213.31 KiB | Viewed 1908 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

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GRE Prep Club Members of the Month: Each member of the month will get three months free access of GRE Prep Club tests. Active Member  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]
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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.
Intern Joined: 10 Jul 2020
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Re: Of the following, which is the best approximation of the per [#permalink]
MagooshStudentHelp wrote:
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.

But isn't the original amount - the one that was in 1981 is 380?
Intern Joined: 01 Aug 2020
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Re: Of the following, which is the best approximation of the per [#permalink]
Carcass wrote:
Attachment:
health.jpg

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%

how can you accurately estimate the values on the graph? i got the question wrong because I estimated the amounts to be 390 and 410, which threw off my percent increase calculation.
Founder  Joined: 18 Apr 2015
Posts: 13332
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Kudos [?]: 3376 , given: 12170

Re: Of the following, which is the best approximation of the per [#permalink]
Expert's post

Attachment: screenshot.40.png [ 39.44 KiB | Viewed 332 times ]

Attachment: screenshot.41.png [ 10.15 KiB | Viewed 331 times ]

As you can see the lower value is 380 and the upper 410 $$\approx$$
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GRE Prep Club Members of the Month: Each member of the month will get three months free access of GRE Prep Club tests. Intern Joined: 30 May 2020
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Re: Of the following, which is the best approximation of the per [#permalink]
1
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Percentage increase is ( final - initial ) / ( initial ) . here initial is 380 and denominator should be 380. you would get approx. 10.5 % Re: Of the following, which is the best approximation of the per   [#permalink] 15 Sep 2020, 17:13
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