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Compare 70/80 and 21/75

70/80 is greater than 21/75

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 75 is 1200
  2. For the 1st fraction, since 80 × 15 = 1200,
    70/80 = 70 × 15/80 × 15 = 1050/1200
  3. Likewise, for the 2nd fraction, since 75 × 16 = 1200,
    21/75 = 21 × 16/75 × 16 = 336/1200
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 1050/1200 > 336/1200 or 70/80 > 21/75

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