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Compare 21/30 and 30/80

21/30 is greater than 30/80

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 80 is 240
  2. For the 1st fraction, since 30 × 8 = 240,
    21/30 = 21 × 8/30 × 8 = 168/240
  3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
    30/80 = 30 × 3/80 × 3 = 90/240
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 168/240 > 90/240 or 21/30 > 30/80

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