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Answers.everydaycalculation.com » Compare fractions

Compare 72/18 and 81/80

1st number: 4 0/18, 2nd number: 1 1/80

72/18 is greater than 81/80

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 80 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 18 × 40 = 720,
    72/18 = 72 × 40/18 × 40 = 2880/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    81/80 = 81 × 9/80 × 9 = 729/720
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 2880/720 > 729/720 or 72/18 > 81/80

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