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Answers.everydaycalculation.com » Compare fractions

Compare 40/21 and 21/4

1st number: 1 19/21, 2nd number: 5 1/4

40/21 is smaller than 21/4

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 4 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 21 × 4 = 84,
    40/21 = 40 × 4/21 × 4 = 160/84
  3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
    21/4 = 21 × 21/4 × 21 = 441/84
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 160/84 < 441/84 or 40/21 < 21/4

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