It is currently 24 Nov 2017, 00:58

### 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

# Percentage

Author Message
Manager
Joined: 05 Jul 2006
Posts: 195

Kudos [?]: 77 [0], given: 0

### Show Tags

16 Aug 2006, 17:14
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

P is x% more in 1998 than in 1997 and and x% less in 1999 than in 1998. If P is 9% less in 1999 than in 1997, x=?

Kudos [?]: 77 [0], given: 0

Senior Manager
Joined: 05 Mar 2006
Posts: 348

Kudos [?]: 13 [0], given: 0

### Show Tags

16 Aug 2006, 17:40
Following the timeline

97: P 98: P(1+x) 99: P(1+x)(1-x)

in 99, P is 91% of P in 97

P(1+x)(1-x) = 0.91*P

(1+x)(1-x) = 0.91

1-x^2 = 0.91

x^2 = 0.09

x = Sq0.09 = .3 (30%)

Kudos [?]: 13 [0], given: 0

CEO
Joined: 20 Nov 2005
Posts: 2892

Kudos [?]: 336 [0], given: 0

Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008

### Show Tags

16 Aug 2006, 21:31
(1+x) * (1-x) = 0.91
x = 0.3 i.e 30%
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

Kudos [?]: 336 [0], given: 0

VP
Joined: 02 Jun 2006
Posts: 1257

Kudos [?]: 108 [0], given: 0

### Show Tags

17 Aug 2006, 09:14
Let
1997 Value = 100
As 99 Value is 9% less from '97, value in 99 = 91

1998 Value = 100+x
1999 Value = 100+x - x(100+x)/100

91 = 100(100+x)-x(100+x)/100

9100 = (100+x)(100-x)

9100= 10000-x^2

or x^2 = 900
x=+30%

Kudos [?]: 108 [0], given: 0

17 Aug 2006, 09:14
Display posts from previous: Sort by

# Percentage

Moderator: chetan2u

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.