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college math

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last month bill's electric bill was $80.77. This month , bill bill was $69.06. what is the%degrease

  • college math -

    degrease? You sure it's electric, and not plumbing?

    the decrease is 80.77-69.06 = 11.71

    as a percent of the bill, 11.71/80.77 = .1449 = 14.49%

  • college math -

    %decrease=(decrement / initial)x 100
    =(80.77-69.06)/80.77 x 100
    =11.71/80.77 x100
    =14.497%

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