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Answers.everydaycalculation.com » Compare fractions

Compare 9/30 and 81/21

1st number: 9/30, 2nd number: 3 18/21

9/30 is smaller than 81/21

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 21 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 30 × 7 = 210,
    9/30 = 9 × 7/30 × 7 = 63/210
  3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
    81/21 = 81 × 10/21 × 10 = 810/210
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 63/210 < 810/210 or 9/30 < 81/21

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