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# Before adding to her collection, Laura had 207 antique figurines store

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SVP
Status: Preparing for the GMAT
Joined: 02 Nov 2016
Posts: 1677
Location: Pakistan
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16 May 2017, 12:05
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Difficulty:

45% (medium)

Question Stats:

61% (01:27) correct 39% (02:16) wrong based on 62 sessions

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Before adding to her collection, Laura had 207 antique figurines stored in 9 boxes. After adding to her collection, she had 386 figurines in 12 boxes. What was the approximate percent increase in the average number of figurines per box?

A. 9%
B. 33%
C. 40%
D. 50%
E. 86%

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Joined: 24 Apr 2016
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16 May 2017, 14:42
average number of figurines per box before adding to her collection = 207/9 = 23
average number of figurines per box before after adding to her collection = 386/12 = 32.1

approximate percent increase in the average number of figurines per box = (32.1 - 23)*100/23

= 39.85%

Senior Manager
Joined: 07 Jul 2012
Posts: 370
Location: India
Concentration: Finance, Accounting
GPA: 3.5

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17 May 2017, 02:37
Average number of figurines before adding to her collection= $$\frac{207}{9}$$= 23
..............................................After ........................................= $$\frac{386}{12}$$ = 32.1

Percent increase= $$\frac{Change}{Initial value}$$*100= $$\frac{32.1-23}{23}$$*100

= 39.85%

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19 May 2017, 06:30
1
Before adding to her collection, Laura had 207 antique figurines stored in 9 boxes. After adding to her collection, she had 386 figurines in 12 boxes. What was the approximate percent increase in the average number of figurines per box?

A. 9%
B. 33%
C. 40%
D. 50%
E. 86%

When Laura had 207 antiques per box, her average was 207/9 = 23 antiques per box. When she added more, her new average was 386/12 = 32.16, which is about 32 per box. Let’s determine the percentage increase.

(32 - 23)/23 x 100

9/23 x 100 = 39.1 percent or about 40%.

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Joined: 02 Aug 2013
Posts: 65
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21 May 2017, 02:10
1
avg before addition =$$\frac{207}{9}$$ = 23

avg after addition = $$\frac{386}{12}$$ = 32.1

change = $$\frac{(32 - 23 )}{23} * 100$$

=>$$\frac{9}{23} * 100$$

To simplify calculation round off numerator to 10 and denominator to 25

=> 10 / 25 * 100 = 10 * 4 = 40 (approx)

Ans: C
Re: Before adding to her collection, Laura had 207 antique figurines store &nbs [#permalink] 21 May 2017, 02:10
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# Before adding to her collection, Laura had 207 antique figurines store

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