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Answers.everydaycalculation.com » Compare fractions

Compare 20/21 and 15/27

20/21 is greater than 15/27

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 27 is 189

    Next, find the equivalent fraction of both fractional numbers with denominator 189
  2. For the 1st fraction, since 21 × 9 = 189,
    20/21 = 20 × 9/21 × 9 = 180/189
  3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
    15/27 = 15 × 7/27 × 7 = 105/189
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 180/189 > 105/189 or 20/21 > 15/27

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