Last visit was: 27 Apr 2026, 23:30 It is currently 27 Apr 2026, 23:30
Home
Messages
Tests
Schools
Events
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
Back to Forum
Create Topic
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 27 Apr 2026
Posts: 109,948
Own Kudos:
811,642
 [7]
Given Kudos: 105,925
Products:
GMAT Club Tests Forum Quiz
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 109,948
Kudos: 811,642
 [7]
Portia purchased a laptop for $480, but after checking the merchant's 05 Jul 2018, 20:37
Kudos
Add Kudos
7
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

15% (low)

Question Stats:

76% (00:48) correct 24% (00:44) wrong based on 223 sessions

History

Date
Time
Result
Not Attempted Yet
Portia purchased a laptop for $480, but after checking the merchant's website realized that she had been overcharged by 20%. By how much, in dollars, was she overcharged?

A. $24
B. $48
C. $80
D. $96
E. $100
ShowHide Answer
Official Answer
C
User avatar
KSBGC
User avatar
Joined: 31 Oct 2013
Last visit: 10 Mar 2022
Posts: 1,240
Own Kudos:
1,510
Given Kudos: 635
Concentration: Accounting, Finance
GPA: 3.68
WE:Analyst (Accounting)
Posts: 1,240
Kudos: 1,510
Portia purchased a laptop for $480, but after checking the merchant's Updated on: 05 Jul 2018, 20:58
Originally posted by KSBGC on 05 Jul 2018, 20:50.
Last edited by KSBGC on 05 Jul 2018, 20:58, edited 4 times in total.
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
Portia purchased a laptop for $480, but after checking the merchant's website realized that she had been overcharged by 20%. By how much, in dollars, was she overcharged?

A. $24
B. $48
C. $80
D. $96
E. $100
Show more


480 includes 20% extra. So,

\(\frac{480}{120}\) * 100 = 400 . So, 400 is the original price.

(480 - 400 ) = 80 ( extra amount )

Thus 80 is overcharged .

The best answer is C.
User avatar
sunita123
User avatar
Joined: 13 Oct 2013
Last visit: 09 Mar 2022
Posts: 116
Own Kudos:
299
 [1]
Given Kudos: 530
Concentration: Strategy, Entrepreneurship
Posts: 116
Kudos: 299
 [1]
Portia purchased a laptop for $480, but after checking the merchant's 05 Jul 2018, 20:54
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
(480 - 400 ) = 48 => you mean 80?


selim
Bunuel
Portia purchased a laptop for $480, but after checking the merchant's website realized that she had been overcharged by 20%. By how much, in dollars, was she overcharged?

A. $24
B. $48
C. $80
D. $96
E. $100


480 includes 20% extra. So,

(480 / 120) * 100 = 400

(480 - 400 ) = 48

Thus 48 is overcharged .

The best answer is B.
Show more
User avatar
munzuto
User avatar
Joined: 23 Feb 2018
Last visit: 07 Jul 2018
Posts: 11
Own Kudos:
24
 [1]
Given Kudos: 18
Posts: 11
Kudos: 24
 [1]
Portia purchased a laptop for $480, but after checking the merchant's 05 Jul 2018, 21:27
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hi,

x*1.2=480
x=400
Ans 480-80 ie C
avatar
manjot123
avatar
Joined: 29 Jul 2018
Last visit: 13 May 2021
Posts: 88
Own Kudos:
25
Given Kudos: 187
Concentration: Finance, Statistics
GMAT 1: 620 Q45 V31
GMAT 1: 620 Q45 V31
Posts: 88
Kudos: 25
Portia purchased a laptop for $480, but after checking the merchant's 14 Sep 2018, 23:08
Kudos
Add Kudos
Bookmarks
Bookmark this Post
(6/5)*x = 480 x = 400
extra money = 80
User avatar
EMPOWERgmatRichC
User avatar
Major Poster
Joined: 19 Dec 2014
Last visit: 31 Dec 2023
Posts: 21,777
Own Kudos:
13,055
Given Kudos: 450
Status:GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Expert
Expert reply
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Posts: 21,777
Kudos: 13,055
Portia purchased a laptop for $480, but after checking the merchant's 01 Dec 2018, 13:38
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hi All,

We're told that Portia purchased a laptop for $480, but after checking the merchant's website realized that she had been overcharged by 20%. We're asked how many dollars she was overcharged. This question can be solved in a couple of different ways, including by TESTing THE ANSWERS.

To start, since $480 is a 'round number', it's likely that the lower number is ALSO a round number (since if we started with a number that was NOT a round number, then increasing that number by 20% would likely lead to an even more-complex number - likely one with cents involved). Working from least to greatest, the first number that would give us another round number would be Answer C - so let's TEST that one first...

Answer C: $80
IF... the overcharge was $80, then....
The lower price is $480 - $80 = $400
20% of $400 = (.2)($400) = $80
This is an exact match for what we were told, so this must be the answer.

Final Answer:
Show Spoiler
C


GMAT assassins aren't born, they're made,
Rich
avatar
kanak2016
avatar
Joined: 03 Oct 2016
Last visit: 13 Aug 2020
Posts: 27
Own Kudos:
4
Given Kudos: 5
Posts: 27
Kudos: 4
Portia purchased a laptop for $480, but after checking the merchant's 06 Nov 2019, 18:13
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
Portia purchased a laptop for $480, but after checking the merchant's website realized that she had been overcharged by 20%. By how much, in dollars, was she overcharged?

A. $24
B. $48
C. $80
D. $96
E. $100
Show more

Let the Actual price be X

x + 0.20x = 480
1.20x= 480
x=400
20% of x= 80

Hence she was overcharged by $80.
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 38,985
Own Kudos:
1,119
Posts: 38,985
Kudos: 1,119
Portia purchased a laptop for $480, but after checking the merchant's 31 May 2021, 14:29
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Automated notice from GMAT Club BumpBot:

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

This post was generated automatically.
Moderators:
Bunuel
Math Expert
109948 posts
Krunaal
Tuck School Moderator
852 posts