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Answers.everydaycalculation.com » Compare fractions

Compare 12/40 and 21/90

12/40 is greater than 21/90

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 90 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 40 × 9 = 360,
    12/40 = 12 × 9/40 × 9 = 108/360
  3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
    21/90 = 21 × 4/90 × 4 = 84/360
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 108/360 > 84/360 or 12/40 > 21/90

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