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Answers.everydaycalculation.com » Compare fractions

Compare 9/21 and 45/12

1st number: 9/21, 2nd number: 3 9/12

9/21 is smaller than 45/12

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 12 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 21 × 4 = 84,
    9/21 = 9 × 4/21 × 4 = 36/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    45/12 = 45 × 7/12 × 7 = 315/84
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 36/84 < 315/84 or 9/21 < 45/12

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