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Answers.everydaycalculation.com » Compare fractions

Compare 30/42 and 21/54

30/42 is greater than 21/54

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 54 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 42 × 9 = 378,
    30/42 = 30 × 9/42 × 9 = 270/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    21/54 = 21 × 7/54 × 7 = 147/378
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 270/378 > 147/378 or 30/42 > 21/54

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