Portia purchased a laptop for $480, but after checking the merchant's

Question

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

KSBGC · Answer

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.

sunita123 · Answer

(480 - 400 ) = 48 => you mean 80?

munzuto · Answer

Hi,

x*1.2=480
x=400 
Ans 480-80 ie C

manjot123 · Answer

(6/5)*x = 480 x = 400
extra money = 80

EMPOWERgmatRichC · Answer

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:  C

GMAT assassins aren't born, they're made, 
Rich

kanak2016 · Answer

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.

bumpbot · Answer

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Portia purchased a laptop for $480, but after checking the merchant's

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