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Answers.everydaycalculation.com » Compare fractions

Compare 3/20 and 10/21

3/20 is smaller than 10/21

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 21 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 20 × 21 = 420,
    3/20 = 3 × 21/20 × 21 = 63/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    10/21 = 10 × 20/21 × 20 = 200/420
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 63/420 < 200/420 or 3/20 < 10/21

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