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21 is what percent of 210?

21 of 210 is 10%

Working out percentage problems of the form "what percent of 210 is 21?"

  1. 21 of 210 can be written as:
    21/210
  2. To find percentage, we need to find an equivalent number with denominator 100. Multiply both numerator & denominator by 100

    21/210 × 100/100
  3. = (21 × 100/210) × 1/100 = 10/100
  4. Therefore, the answer is 10%

    If you are using a calculator, simply enter 21÷210×100 which will give you 10 as the answer.

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