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Answers.everydaycalculation.com » Compare fractions

Compare 20/81 and 90/70

1st number: 20/81, 2nd number: 1 20/70

20/81 is smaller than 90/70

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 70 is 5670

    Next, find the equivalent fraction of both fractional numbers with denominator 5670
  2. For the 1st fraction, since 81 × 70 = 5670,
    20/81 = 20 × 70/81 × 70 = 1400/5670
  3. Likewise, for the 2nd fraction, since 70 × 81 = 5670,
    90/70 = 90 × 81/70 × 81 = 7290/5670
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 1400/5670 < 7290/5670 or 20/81 < 90/70

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