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# The number of coronary-bypass operations performed in the United State

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The number of coronary-bypass operations performed in the United State  [#permalink]

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03 Jul 2017, 12:42
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Difficulty:

25% (medium)

Question Stats:

74% (01:32) correct 26% (01:49) wrong based on 165 sessions

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The number of coronary-bypass operations performed in the United States increased from 13,000 in 1970 to 191,000 in 1983. What was the approidmate percent increase in the number of coronary-bypass operations from 1970 to 1983 ?

(A) 90%
(B) 140%
(C) 150%
(D) 1,400%
(E) 1,600%

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Re: The number of coronary-bypass operations performed in the United State  [#permalink]

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03 Jul 2017, 12:49
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carcass wrote:
The number of coronary-bypass operations performed in the United States increased from 13,000 in 1970 to 191,000 in 1983. What was the approidmate percent increase in the number of coronary-bypass operations from 1970 to 1983 ?

(A) 90%
(B) 140%
(C) 150%
(D) 1,400%
(E) 1,600%

Percent Change $$=($$ Change / Initial value $$)* 100$$

Change $$= 191,000 - 13,000 = 178,000$$

Required Percent Increase $$= \frac{178,000}{13,000} * 100 = 1369.23$$ % $$= > Approximately = 1,400$$%

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Re: The number of coronary-bypass operations performed in the United State  [#permalink]

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03 Jul 2017, 12:59
1
13 to 191
130 is 1000%
61 is closer to 52 (13*4)
Hence D

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Re: The number of coronary-bypass operations performed in the United State  [#permalink]

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03 Jul 2017, 12:59
1
Since 13000 becomes 191000, the approximate percentage increase is in excess of 1000%(10 times more)

Only Option D and E remain for careful analysis.
15 times more is 195000(1500%), but we are able to see that the difference, which is 178000 is less then 195000
Hence, we have an answer option which matches(Option D)
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Re: The number of coronary-bypass operations performed in the United State  [#permalink]

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03 Jul 2017, 14:25
carcass wrote:
The number of coronary-bypass operations performed in the United States increased from 13,000 in 1970 to 191,000 in 1983. What was the approidmate percent increase in the number of coronary-bypass operations from 1970 to 1983 ?

(A) 90%
(B) 140%
(C) 150%
(D) 1,400%
(E) 1,600%

1970 ===> 13,000

1983 ===> 191,000

% Increase $$= 191,000 - \frac{13,000}{13,000} * 100$$

% Increase $$= \frac{178000}{130}$$

% Increase $$= \frac{17800}{13}$$

% Increase $$= ~ 1369$$
$$% Increase = 1400$$ %

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Re: The number of coronary-bypass operations performed in the United State  [#permalink]

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02 Oct 2018, 19:19
carcass wrote:
The number of coronary-bypass operations performed in the United States increased from 13,000 in 1970 to 191,000 in 1983. What was the approidmate percent increase in the number of coronary-bypass operations from 1970 to 1983 ?

(A) 90%
(B) 140%
(C) 150%
(D) 1,400%
(E) 1,600%

We use the percent change formula and substitute the appropriate values:

(New - Old)/Old x 100

(191,000 - 13,000)/13,000 x 100

178,000/13,000 x 100

178/13 x 100 ≈ 1,400%

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Re: The number of coronary-bypass operations performed in the United State   [#permalink] 02 Oct 2018, 19:19
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