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Answers.everydaycalculation.com » Compare fractions

Compare 72/42 and 81/40

1st number: 1 30/42, 2nd number: 2 1/40

72/42 is smaller than 81/40

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 40 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 42 × 20 = 840,
    72/42 = 72 × 20/42 × 20 = 1440/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    81/40 = 81 × 21/40 × 21 = 1701/840
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 1440/840 < 1701/840 or 72/42 < 81/40

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