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Answers.everydaycalculation.com » Compare fractions

Compare 81/30 and 20/40

1st number: 2 21/30, 2nd number: 20/40

81/30 is greater than 20/40

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 40 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 30 × 4 = 120,
    81/30 = 81 × 4/30 × 4 = 324/120
  3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
    20/40 = 20 × 3/40 × 3 = 60/120
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 324/120 > 60/120 or 81/30 > 20/40

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