MathematicsIf of a number is 84 , then of that number is:

If of a number is 84 , then of that number is:


  1. A
    25.2
  2. B
    420
  3. C
    42000
  4. D
    2520 

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    Solution:

    Concept- Here, we employ the % idea, which denotes a portion of a total amount. By dividing the result by 100, the percentage sign (percent) is always used to represent percentages. Claim we can write of a value as and multiply it to the value of which we are calculating the percentage.
    When any number is of another number, then the first number is times of the other number i.e. of i.e. part of Here as well, we compute the starting number using the unitary technique before determining the needed portion of the number. When using the unitary technique, we divide the total value by the number of units to get the value of a single unit, and we multiply the value of a single unit by the number of units to determine the value of multiple units.
    Let the number be .
    Given, of a number is 84
    of the number is And is given as 84
    Equate to 84, that is  Divide both sides of the equation by 0.06 and simplify.
    Multiply both sides of the equation by 100 to obtain the value of x.
    of the number implies times the value of .
    Multiply to the obtained value of to obtain the answer.
    Hence the correct answer is option 3.
     Syllabus: CBSE
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