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15 July, 23:26

Let p be the percent decrease in the price of a DVD recorder that is marked down from $500 to $400. Which proportion can be used to compute p?

A. $500-$400/$400=p/100

B. $500-$400/$500=p/100

C. $400-$500/$500=p/100

D. $400-$500/$400=p/100

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Answers (1)
  1. 15 July, 23:53
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    The correct answer is C. $400-$500/$500=p/100.

    The formula for percent change is as follows.

    New - Old / Old = Percent change.

    With 500 being the old score, we would look for it to be subtracted and on the bottom. C is the only option that has that.
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Home » Mathematics » Let p be the percent decrease in the price of a DVD recorder that is marked down from $500 to $400. Which proportion can be used to compute p? A. $500-$400/$400=p/100 B. $500-$400/$500=p/100 C. $400-$500/$500=p/100 D. $400-$500/$400=p/100
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