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Answers.everydaycalculation.com » Compare fractions

Compare 30/49 and 21/81

30/49 is greater than 21/81

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 49 and 81 is 3969

    Next, find the equivalent fraction of both fractional numbers with denominator 3969
  2. For the 1st fraction, since 49 × 81 = 3969,
    30/49 = 30 × 81/49 × 81 = 2430/3969
  3. Likewise, for the 2nd fraction, since 81 × 49 = 3969,
    21/81 = 21 × 49/81 × 49 = 1029/3969
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 2430/3969 > 1029/3969 or 30/49 > 21/81

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