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Answers.everydaycalculation.com » Compare fractions

Compare 18/42 and 42/80

18/42 is smaller than 42/80

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 80 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 42 × 40 = 1680,
    18/42 = 18 × 40/42 × 40 = 720/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    42/80 = 42 × 21/80 × 21 = 882/1680
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 720/1680 < 882/1680 or 18/42 < 42/80

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