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Answers.everydaycalculation.com » Compare fractions

Compare 1/20 and 3/21

1/20 is smaller than 3/21

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,
    1/20 = 1 × 21/20 × 21 = 21/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    3/21 = 3 × 20/21 × 20 = 60/420
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 21/420 < 60/420 or 1/20 < 3/21

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