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In one year, the Dow Jones Industrial Average increased from 3,945 to 4,386. What percent increase does this represent to the nearest tenth of a percent?

  • math -

    And your answer is??

  • math -

    1%

  • math -

    How did you get that? I got a much different answer.

  • math -

    I divide 3945/4386=0.89, then I just rounded to 1%.

  • math -

    Ah -- you forgot the subtraction part.

    4,386 - 3,945 = 441

    Now compare that difference with the original number.

    441/3,945 = ?

    We can prove an answer by reversing the procedure.

    3,945 * 0.1 = 394.5

    3,945 + 394.5 does not equal 4,386.

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