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Answers.everydaycalculation.com » Compare fractions

Compare 3/20 and 21/18

1st number: 3/20, 2nd number: 1 3/18

3/20 is smaller than 21/18

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 18 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    3/20 = 3 × 9/20 × 9 = 27/180
  3. Likewise, for the 2nd fraction, since 18 × 10 = 180,
    21/18 = 21 × 10/18 × 10 = 210/180
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 27/180 < 210/180 or 3/20 < 21/18

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