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Answers.everydaycalculation.com » Compare fractions

Compare 42/8 and 21/30

1st number: 5 2/8, 2nd number: 21/30

42/8 is greater than 21/30

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 30 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 8 × 15 = 120,
    42/8 = 42 × 15/8 × 15 = 630/120
  3. Likewise, for the 2nd fraction, since 30 × 4 = 120,
    21/30 = 21 × 4/30 × 4 = 84/120
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 630/120 > 84/120 or 42/8 > 21/30

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