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Answers.everydaycalculation.com » Compare fractions

Compare 5/20 and 42/81

5/20 is smaller than 42/81

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 81 is 1620

    Next, find the equivalent fraction of both fractional numbers with denominator 1620
  2. For the 1st fraction, since 20 × 81 = 1620,
    5/20 = 5 × 81/20 × 81 = 405/1620
  3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
    42/81 = 42 × 20/81 × 20 = 840/1620
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 405/1620 < 840/1620 or 5/20 < 42/81

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