Q:

Proportion(rise percentage) | In a certain store the prices of all articles decreased by 30%...

NerdutellaRana
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2022-05-11
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In a certain store the prices of all articles decreased by 30%.

  1. Designated by x the original price of an article and by y its new price. Express y in terms of x.
  2. A shirt costs 100$. What will its new price be?
  3. We paid 140$ for an item. What was its original price?
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NerdutellaRana
2022-05-11
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  1. y=(1-0.3)x so y=0.7x.
  2. y=0.7(100)=70$
  3. 140=0.7x so x=140/0.7=200$

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