Last visit was: 24 Apr 2026, 09:46 It is currently 24 Apr 2026, 09:46
Close
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
Your Progress

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
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Close
Request Expert Reply
Confirm Cancel
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 24 Apr 2026
Posts: 109,814
Own Kudos:
811,030
 [2]
Given Kudos: 105,871
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 109,814
Kudos: 811,030
 [2]
Kudos
Add Kudos
2
Bookmarks
Bookmark this Post
User avatar
vaibhav1221
Joined: 19 Nov 2017
Last visit: 24 Jul 2025
Posts: 292
Own Kudos:
410
 [2]
Given Kudos: 50
Location: India
GMAT 1: 710 Q49 V38
GPA: 3.25
WE:Account Management (Advertising and PR)
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
soapbolt
Joined: 05 Oct 2017
Last visit: 21 Apr 2019
Posts: 58
Own Kudos:
67
 [3]
Given Kudos: 245
Location: India
Posts: 58
Kudos: 67
 [3]
1
Kudos
Add Kudos
2
Bookmarks
Bookmark this Post
avatar
sarajkluz
Joined: 24 Nov 2018
Last visit: 28 Nov 2018
Posts: 6
Own Kudos:
6
 [3]
Given Kudos: 2
Posts: 6
Kudos: 6
 [3]
2
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
10 articles at price x = 8 articles at price y

10x=8y=100
x=10
y=12.5

Determine change
(new-old)/old
=(2.5/10) x (100)
=25%

*excuse my basic language on this :)
User avatar
sunita123
Joined: 13 Oct 2013
Last visit: 09 Mar 2022
Posts: 116
Own Kudos:
Given Kudos: 530
Concentration: Strategy, Entrepreneurship
Posts: 116
Kudos: 298
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Can you pls explain why it is equal to 100

"10x=8y=100"


sarajkluz
10 articles at price x = 8 articles at price y

10x=8y=100
x=10
y=12.5

Determine change
(new-old)/old
=(2.5/10) x (100)
=25%

*excuse my basic language on this :)
User avatar
soapbolt
Joined: 05 Oct 2017
Last visit: 21 Apr 2019
Posts: 58
Own Kudos:
Given Kudos: 245
Location: India
Posts: 58
Kudos: 67
Kudos
Add Kudos
Bookmarks
Bookmark this Post
sunita123
Can you pls explain why it is equal to 100

"10x=8y=100"


He just assumed it randomly, it can be anything because we taking the ratio here and eventually all the extra thing will going to cancel out.

Suppose if we consider

10X= 8Y = 1000

then X = 100 and Y = 125
=> change will be
\(\frac{125-100}{100}\) *100

= 25%

again the same result.

Hope it helped :)
User avatar
ArjunJag1328
Joined: 24 Dec 2017
Last visit: 12 Jan 2025
Posts: 135
Own Kudos:
Given Kudos: 48
Location: India
Concentration: Strategy, Real Estate
Schools: Johnson '21
Schools: Johnson '21
Posts: 135
Kudos: 74
Kudos
Add Kudos
Bookmarks
Bookmark this Post
CP of 10 articles = SP of 8 articles

Let's assume that CP of 10 articles = 100
Therefore, CP of 1 article will be = 10

SP of 8 articles = 100
SP of 1 article = 12.5

The key figures here to get to the answer are 12.5 and 10.

%increase = \(\frac{change}{original}\)\(*\)100 => \(\frac{2.5}{10}\)\(*\)100 => 2.5\(*\)10 =>25

D is the answer (25% gain)
User avatar
brains
Joined: 30 May 2017
Last visit: 04 Apr 2026
Posts: 86
Own Kudos:
Given Kudos: 169
Location: India
Concentration: Finance, Strategy
GPA: 3.73
WE:Engineering (Consulting)
Products:
Kudos
Add Kudos
Bookmarks
Bookmark this Post
C.P * 10 = S.P * 8

S.P = C.P *(10/8) = C.P *(5/4)

Hence fraction 5/4 is equivalent of 25% increase

So Gain of 25% is the answer
User avatar
ScottTargetTestPrep
User avatar
Target Test Prep Representative
Joined: 14 Oct 2015
Last visit: 24 Apr 2026
Posts: 22,283
Own Kudos:
26,534
 [1]
Given Kudos: 302
Status:Founder & CEO
Affiliations: Target Test Prep
Location: United States (CA)
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 22,283
Kudos: 26,534
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
The cost price of 10 articles is equal to the selling price of 8 articles. The gain or loss percent is :

(A) Loss 25%
(B) Loss 20%
(C) Gain 20%
(D) Gain 25%
(E) Gain 30%

If 8 articles were sold at the cost price of 10 articles, find gain or loss percent.

We can create the equation:

10C = 8S

5C = 4S

If cost price = 4, then sale price = 5. Thus:

(5 - 4)/4 x 100 = 1/4 x 100 = 25% gain.

Answer: D
User avatar
Jawad001
Joined: 14 Sep 2019
Last visit: 10 Nov 2022
Posts: 216
Own Kudos:
Given Kudos: 31
Posts: 216
Kudos: 153
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel wrote:
The cost price of 10 articles is equal to the selling price of 8 articles. The gain or loss percent is :

(A) Loss 25%
(B) Loss 20%
(C) Gain 20%
(D) Gain 25%
(E) Gain 30%

10 C = 8S = 80
10 C = 80 and 8 S = 80
C = 8 S = 10

Profit = (S-C/C)100
= 2/8*100
= 25%(D)
Moderators:
Math Expert
109814 posts
Tuck School Moderator
853 posts