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Answers.everydaycalculation.com » Compare fractions

Compare 84/21 and 90/80

1st number: 4 0/21, 2nd number: 1 10/80

84/21 is greater than 90/80

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 80 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 21 × 80 = 1680,
    84/21 = 84 × 80/21 × 80 = 6720/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    90/80 = 90 × 21/80 × 21 = 1890/1680
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 6720/1680 > 1890/1680 or 84/21 > 90/80

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