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Answers.everydaycalculation.com » Compare fractions

Compare 9/21 and 20/30

9/21 is smaller than 20/30

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 30 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 21 × 10 = 210,
    9/21 = 9 × 10/21 × 10 = 90/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    20/30 = 20 × 7/30 × 7 = 140/210
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 90/210 < 140/210 or 9/21 < 20/30

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