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Answers.everydaycalculation.com » Compare fractions

Compare 4/15 and 30/21

1st number: 4/15, 2nd number: 1 9/21

4/15 is smaller than 30/21

Steps for comparing fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 15 × 7 = 105,
    4/15 = 4 × 7/15 × 7 = 28/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    30/21 = 30 × 5/21 × 5 = 150/105
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 28/105 < 150/105 or 4/15 < 30/21

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