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March 29, 2017

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If the cost of a cell phone has decreased 400% during the past 10 years, does that correspond to a cost decrease of four times?

  • algebra - ,

    This has me confused. If you decreased the cost of something 100%, wouldn't that mean that the cell phone would be free? With 400% decrease, does the company pay you three times the original cost to take the phone?

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