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Answers.everydaycalculation.com » Compare fractions

Compare 21/2 and 21/15

1st number: 10 1/2, 2nd number: 1 6/15

21/2 is greater than 21/15

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 15 is 30
  2. For the 1st fraction, since 2 × 15 = 30,
    21/2 = 21 × 15/2 × 15 = 315/30
  3. Likewise, for the 2nd fraction, since 15 × 2 = 30,
    21/15 = 21 × 2/15 × 2 = 42/30
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 315/30 > 42/30 or 21/2 > 21/15

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