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07 Dec 2012, 05:31
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A store reported total sales of $385 million for February of this year. If the total sales for the same month last year was$320 million, approximately what was the percent increase in sales?

(A) 2%
(B) 17%
(C) 20%
(D) 65%
(E) 83%
[Reveal] Spoiler: OA
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21 Oct 2015, 03:28
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A store reported total sales of $385 million for February of this year. If the total sales for the same month last year was$320 million, approximately what was the percent increase in sales?

(A) 2%
(B) 17%
(C) 20%
(D) 65%
(E) 83%

Percentage increase = $$\frac{(Final - Original)}{Original}*100$$

Substituting the values here

$$\frac{(385 - 320)}{320}$$* 100 = (65/320)*100 = 20% approx
Option C
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Re: A store reported total sales of $385 million for February of [#permalink] Show Tags 07 Dec 2012, 05:35 Expert's post 2 This post was BOOKMARKED Walkabout wrote: A store reported total sales of$385 million for February of this year. If the total sales for the same month last year was $320 million, approximately what was the percent increase in sales? (A) 2% (B) 17% (C) 20% (D) 65% (E) 83% Last year's sales =$320 million;
This year's sales = $385 million; Increase =$65 million.

Now, 20% of $320 million is$64 million, which is very close to actual increase of $65 million. Answer: C. OR: General formula for percent increase or decrease, or percent change: $$Percent=\frac{Change}{Original}*100$$ --> $$Percent=\frac{65}{320}*100=\frac{13}{64}*100\approx{\frac{13}{65}}*100=20%$$. Answer: C. _________________ Intern Joined: 06 Jun 2012 Posts: 18 Followers: 0 Kudos [?]: 0 [0], given: 7 Re: A store reported total sales of$385 million for February of [#permalink]

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15 Dec 2012, 02:45
This might sound stupid, but how do we know that we need to round up 64 to 65 without losing to much time. I did this question before and it took over 2 min before i knew that i had to round 64 to 65 in order to solve the problem. Do you have any trick in mind?
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24 Sep 2014, 19:31
Increase = 385 - 320 = 65

% Increase $$= \frac{65}{320} * 100 = 20%$$

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Re: A store reported total sales of $385 million for February of [#permalink] Show Tags 20 Oct 2015, 03:42 Hello from the GMAT Club BumpBot! Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos). Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email. _________________ Re: A store reported total sales of$385 million for February of   [#permalink] 20 Oct 2015, 03:42
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