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Compare 45/9 and 81/21

1st number: 5 0/9, 2nd number: 3 18/21

45/9 is greater than 81/21

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 21 is 63
  2. For the 1st fraction, since 9 × 7 = 63,
    45/9 = 45 × 7/9 × 7 = 315/63
  3. Likewise, for the 2nd fraction, since 21 × 3 = 63,
    81/21 = 81 × 3/21 × 3 = 243/63
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 315/63 > 243/63 or 45/9 > 81/21

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