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Discussion :: Percentage

  1.  A student multiplied a number by \( \frac { 3} { 5 } \) instead of \( \frac { 5} { 3 } \)What is the percentage error in the calculation ?

    2. A.

    34%
    B.
    44%
    C.

    54%
    D.

    64%

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    Answer : Option D

    Explanation :

    Let the number be x.

    Then , error = \( \frac { 5} { 3 } \) x \( \frac { 3} { 5 } \) x = \(\frac { 16 } { 15 } \)x

    Error % =  [ \(\frac { 16 } { 15 } \) x \( \frac { 3} { 5 } \) x 100 ] % =64%

     

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