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Cindy has her eye on a sundress but thinks it is too expensi
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Updated on: 21 Jul 2013, 01:06

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Question Stats:

78% (01:20) correct 22% (02:01) wrong based on 328 sessions

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Cindy has her eye on a sundress but thinks it is too expensive. It goes on sale for 15% less than the original price. Before Cindy can buy the dress, however, the store raises the new price by 25%. If the dress cost $68 after it went on sale for 15% off, what is the difference between the original price and the final price?

Re: Cindy has her eye on a sundress but thinks it is too expensi
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21 Jul 2013, 01:02

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Cindy has her eye on a sundress but thinks it is too expensive. It goes on sale for 15% less than the original price. Before Cindy can buy the dress, however, the store raises the new price by 25%. If the dress cost $68 after it went on sale for 15% off, what is the difference between the original price and the final price?

$0.00 $1.00 $3.40 $5.00 $6.80

\(OriginalPrice*\frac{85}{100}=68\) => \(OP=80\)$

Than the discouts/raises are as follow \(80*\frac{85}{100}*\frac{125}{100}=68*\frac{5}{4}=85\)

Difference=\(85-80=5\)$
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Re: Cindy has her eye on a sundress but thinks it is too expensi
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21 Jul 2013, 01:05

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espa wrote:

Cindy has her eye on a sundress but thinks it is too expensive. It goes on sale for 15% less than the original price. Before Cindy can buy the dress, however, the store raises the new price by 25%. If the dress cost $68 after it went on sale for 15% off, what is the difference between the original price and the final price?

Re: Cindy has her eye on a sundress but thinks it is too expensi
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22 Jul 2013, 12:01

1

You can use this way if you are uncomfortable multiplying by decimals:

Original Amount: Using this percent change formula: NA = OA(1+/-(p/100)) Our NA = 68 and our percent change = 15% less than so, 68 = OA(1-(15/100)) 68 = OA(85/100) OA = 80

Final Amount: Using this percent change formula: NA = OA (1+/-(p/100))(1+/-(p/100))............. Our NA is the unknown final price Plug in your original price for OA NA = 80(1-(15/100))(1+(25/100)) NA = 80(85/100)(125/100) NA = 85

We use (1-(15/100)) because our sale price is 15% less than original We use (1+(25/100)) because our final price is 25% more than our sale price

Re: Cindy has her eye on a sundress but thinks it is too expensi
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30 Sep 2018, 12:58

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