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Answers.everydaycalculation.com » Compare fractions

Compare 70/21 and 90/9

1st number: 3 7/21, 2nd number: 10 0/9

70/21 is smaller than 90/9

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 9 is 63

    Next, find the equivalent fraction of both fractional numbers with denominator 63
  2. For the 1st fraction, since 21 × 3 = 63,
    70/21 = 70 × 3/21 × 3 = 210/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    90/9 = 90 × 7/9 × 7 = 630/63
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 210/63 < 630/63 or 70/21 < 90/9

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