GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 22 Jun 2018, 01:59

### 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

# If 1,500 is increased by 20%, and then reduced by y%

Author Message
TAGS:

### Hide Tags

SVP
Joined: 06 Sep 2013
Posts: 1882
Concentration: Finance
If 1,500 is increased by 20%, and then reduced by y% [#permalink]

### Show Tags

Updated on: 20 Sep 2013, 17:34
00:00

Difficulty:

(N/A)

Question Stats:

100% (00:45) correct 0% (00:00) wrong based on 11 sessions

### HideShow timer Statistics

If 1,500 is increased by 20%, and then reduced by y%, yielding 1,080, what is y?

OA is
40%

Originally posted by jlgdr on 20 Sep 2013, 17:20.
Last edited by Bunuel on 20 Sep 2013, 17:34, edited 1 time in total.
Edited the question.
Math Expert
Joined: 02 Sep 2009
Posts: 46279
Re: If 1,500 is increased by 20%, and then reduced by y% [#permalink]

### Show Tags

20 Sep 2013, 17:26
jlgdr wrote:
If 1,500 is increased by 20%, and then reduced by y%, yielding 1,080, what is y?

OA is
40%

1,500*1.2 = 1,800.

1,800(1 - y/100) = 1,080 --> (1 - y/100) = 0.6 --> y = 40%.
_________________
Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 8102
Location: Pune, India
Re: If 1,500 is increased by 20%, and then reduced by y% [#permalink]

### Show Tags

21 Mar 2017, 23:33
1
jlgdr wrote:
If 1,500 is increased by 20%, and then reduced by y%, yielding 1,080, what is y?

OA is
40%

Using percent-fraction equivalents:

1500 * (6/5) * n = 1080

n = 1080/300*6 = 3/5

This is equivalent to a reduction of 40%. So y = 40

For more, check:
https://www.veritasprep.com/blog/2011/0 ... rcentages/
https://www.veritasprep.com/blog/2011/0 ... e-changes/
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for \$199

Veritas Prep Reviews

Board of Directors
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 3511
Location: India
GPA: 3.5
Re: If 1,500 is increased by 20%, and then reduced by y% [#permalink]

### Show Tags

22 Mar 2017, 07:11
1
jlgdr wrote:
If 1,500 is increased by 20%, and then reduced by y%, yielding 1,080, what is y?

OA is
40%

$$\frac{1500*( 100 + 20 )}{100} * \frac{( 100 - y )}{100} = 1080$$

Or, $$1800*\frac{( 100 - y )}{100} = 1080$$

Or, $$18( 100 - y ) = 1080$$

Or, $$2( 100 - y ) = 120$$

Or, $$100 - y = 60$$

So, $$y = 40$$
_________________

Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )

Target Test Prep Representative
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2570
Re: If 1,500 is increased by 20%, and then reduced by y% [#permalink]

### Show Tags

23 Mar 2017, 16:59
1
jlgdr wrote:
If 1,500 is increased by 20%, and then reduced by y%, yielding 1,080, what is y?

OA is
40%

If 1,500 is increased by 20%, we have:

1,500 x 1.2 = 1,800

If 1,800 is reduced by y% to give us 1,080, we have:

(1 - y/100)(1800) = 1,080

1,800 - 18y = 1,080

720 = 18y

y = 40
_________________

Jeffery Miller

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Director
Joined: 04 Dec 2015
Posts: 700
Location: India
Concentration: Technology, Strategy
Schools: ISB '19, IIMA , IIMB, XLRI
WE: Information Technology (Consulting)
If 1,500 is increased by 20%, and then reduced by y% [#permalink]

### Show Tags

17 May 2017, 15:55
If 1,500 is increased by 20%, and then reduced by y%, yielding 1,080, what is y?

1500 increased by 20% = 120% of 1500 = $$\frac{120}{100}$$ x 1500 = 1800
1800 decreased by y% = (100-y) % of 1800 = $$\frac{(100-y)}{100}$$ x 1800 = (100-y) x 18 = 1080
100-y = $$\frac{1080}{18}$$ = 60
y = 100 - 60 = 40
y = 40%

_________________
Kindly press "+1 Kudos" to appreciate
If 1,500 is increased by 20%, and then reduced by y%   [#permalink] 17 May 2017, 15:55
Display posts from previous: Sort by

# If 1,500 is increased by 20%, and then reduced by y%

 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®.