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Compare 12/42 and 45/20

1st number: 12/42, 2nd number: 2 5/20

12/42 is smaller than 45/20

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 20 is 420
  2. For the 1st fraction, since 42 × 10 = 420,
    12/42 = 12 × 10/42 × 10 = 120/420
  3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
    45/20 = 45 × 21/20 × 21 = 945/420
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 120/420 < 945/420 or 12/42 < 45/20

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