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Answers.everydaycalculation.com » Compare fractions

Compare 1/21 and 3/15

1/21 is smaller than 3/15

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 15 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 21 × 5 = 105,
    1/21 = 1 × 5/21 × 5 = 5/105
  3. Likewise, for the 2nd fraction, since 15 × 7 = 105,
    3/15 = 3 × 7/15 × 7 = 21/105
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 5/105 < 21/105 or 1/21 < 3/15

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