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Answers.everydaycalculation.com » Compare fractions

Compare 21/90 and 20/16

1st number: 21/90, 2nd number: 1 4/16

21/90 is smaller than 20/16

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 16 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 90 × 8 = 720,
    21/90 = 21 × 8/90 × 8 = 168/720
  3. Likewise, for the 2nd fraction, since 16 × 45 = 720,
    20/16 = 20 × 45/16 × 45 = 900/720
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 168/720 < 900/720 or 21/90 < 20/16

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