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Answers.everydaycalculation.com » Compare fractions

Compare 6/15 and 20/21

6/15 is smaller than 20/21

Steps for comparing fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 15 × 7 = 105,
    6/15 = 6 × 7/15 × 7 = 42/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    20/21 = 20 × 5/21 × 5 = 100/105
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 42/105 < 100/105 or 6/15 < 20/21

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