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Answers.everydaycalculation.com » Compare fractions

Compare 21/90 and 30/64

21/90 is smaller than 30/64

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 64 is 2880

    Next, find the equivalent fraction of both fractional numbers with denominator 2880
  2. For the 1st fraction, since 90 × 32 = 2880,
    21/90 = 21 × 32/90 × 32 = 672/2880
  3. Likewise, for the 2nd fraction, since 64 × 45 = 2880,
    30/64 = 30 × 45/64 × 45 = 1350/2880
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 672/2880 < 1350/2880 or 21/90 < 30/64

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