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Compare 7/20 and 7/81

7/20 is greater than 7/81

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 81 is 1620
  2. For the 1st fraction, since 20 × 81 = 1620,
    7/20 = 7 × 81/20 × 81 = 567/1620
  3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
    7/81 = 7 × 20/81 × 20 = 140/1620
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 567/1620 > 140/1620 or 7/20 > 7/81

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