Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 03 Jul 2015, 17:50

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# DS: percentage increase/decrease

Author Message
TAGS:
Manager
Joined: 22 Feb 2006
Posts: 97
Followers: 1

Kudos [?]: 28 [0], given: 0

DS: percentage increase/decrease [#permalink]  25 Aug 2009, 15:39
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 2 sessions
-------------------------------------------
Q29:
The annual rent collected by a corporation from a certain building was x percent more in 1998 than in 1997 and y percent less in 1999 than in 1998. Was the annual rent collected by the corporation from the building more in 1999 than in 1997?

(1) x > y
(2) xy/100 < x – y

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
Senior Manager
Joined: 23 Jun 2009
Posts: 354
Location: Turkey
Schools: UPenn, UMich, HKS, UCB, Chicago
Followers: 5

Kudos [?]: 98 [1] , given: 63

Re: DS: percentage increase/decrease [#permalink]  26 Aug 2009, 03:48
1
KUDOS
1997=100
1998=100+x
1999=(100+x)*(100-y)/100
does 1999>1997?
i.e.
does
(100+x)*(100-y)/100>100
10000+100x-100y-xy>10000
100x-100y-xy>0
100x>100y+xy
So
I)x>y is INSUFF, because we don't know how much bigger. Does x bigger than y that offsets xy/100? i.e.
x=%30, y=%25
1998=%130
1999=%87,5
x=%30, y=%10
1998=%130
1999=%117
II)SUFF
xy/100<x-y
xy<100x-100y
xy+100y<100x
this is our inequality.
Senior Manager
Joined: 18 Aug 2009
Posts: 437
Schools: UT at Austin, Indiana State University, UC at Berkeley
WE 1: 5.5
WE 2: 5.5
WE 3: 6.0
Followers: 6

Kudos [?]: 73 [0], given: 16

Re: DS: percentage increase/decrease [#permalink]  26 Aug 2009, 03:49
Need explanation for the question as well. Thanks
_________________

Never give up,,,

Intern
Joined: 18 Aug 2009
Posts: 8
Followers: 0

Kudos [?]: 0 [0], given: 4

Re: DS: percentage increase/decrease [#permalink]  26 Aug 2009, 22:28
Can this be solved by assuming values?
Manager
Joined: 10 Jul 2009
Posts: 129
Location: Ukraine, Kyiv
Followers: 2

Kudos [?]: 64 [0], given: 60

Re: DS: percentage increase/decrease [#permalink]  20 Sep 2009, 04:43
I think maliyeci's way is the best one to approach this.
_________________

Never, never, never give up

Manager
Joined: 15 Sep 2009
Posts: 138
Followers: 1

Kudos [?]: 18 [0], given: 2

Re: DS: percentage increase/decrease [#permalink]  20 Sep 2009, 06:59
I wud go with option B.

statement ii alone is suff.
Re: DS: percentage increase/decrease   [#permalink] 20 Sep 2009, 06:59
Similar topics Replies Last post
Similar
Topics:
DS - Percentage 2 01 May 2009, 06:37
1 DS - Percentage 4 01 May 2009, 06:29
DS on percentages 1 25 Aug 2007, 17:38
DS: Percentage of Union Members 4 19 Nov 2005, 16:31
ds-percentage increase 3 15 Jul 2005, 07:57
Display posts from previous: Sort by