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the MP3 player Nicky purchased was marked 20% off the original price.At the register the clerk took 48$ off the original price. What was the original price of the MP3 player?
 Nov 9, 2013
 #1
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Use the proportion:
is/of=%/100

so in this case:
48/x=20/100

and solve for x:
x=240

so the original price was $240
 Nov 9, 2013
 #2
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The MP3 player Nicky purchased was marked 20% off the original price. At the register, the clerk took 48$ off the original price. What was the original price of the MP3 player?

48$ must be 20% of the original cost. In math, whenever you see the word "is," think "equals." Also, whenever you see "of," think multiplication.

20% of the original cost is 48$.
0.20 times the original cost = 48$
0.20(original cost) = 48
original cost = (48)/(0.20)

original cost = $240
 Nov 9, 2013

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