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Answers.everydaycalculation.com » Compare fractions

Compare 15/21 and 20/25

15/21 is smaller than 20/25

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 25 is 525

    Next, find the equivalent fraction of both fractional numbers with denominator 525
  2. For the 1st fraction, since 21 × 25 = 525,
    15/21 = 15 × 25/21 × 25 = 375/525
  3. Likewise, for the 2nd fraction, since 25 × 21 = 525,
    20/25 = 20 × 21/25 × 21 = 420/525
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 375/525 < 420/525 or 15/21 < 20/25

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