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Answers.everydaycalculation.com » Compare fractions

Compare 5/21 and 70/15

1st number: 5/21, 2nd number: 4 10/15

5/21 is smaller than 70/15

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 15 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 21 × 5 = 105,
    5/21 = 5 × 5/21 × 5 = 25/105
  3. Likewise, for the 2nd fraction, since 15 × 7 = 105,
    70/15 = 70 × 7/15 × 7 = 490/105
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 25/105 < 490/105 or 5/21 < 70/15

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