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Everydaycalculation.com » Answers » Compare fractions

Compare 21/7 and 5/8

1st number: 3 0/7, 2nd number: 5/8

21/7 is greater than 5/8

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 8 is 56
  2. For the 1st fraction, since 7 × 8 = 56,
    21/7 = 21 × 8/7 × 8 = 168/56
  3. Likewise, for the 2nd fraction, since 8 × 7 = 56,
    5/8 = 5 × 7/8 × 7 = 35/56
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 168/56 > 35/56 or 21/7 > 5/8

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