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Subtract 4/9 from 3/42

3/42 - 4/9 is -47/126.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 9 is 126
  2. For the 1st fraction, since 42 × 3 = 126,
    3/42 = 3 × 3/42 × 3 = 9/126
  3. Likewise, for the 2nd fraction, since 9 × 14 = 126,
    4/9 = 4 × 14/9 × 14 = 56/126
  4. Subtract the two fractions:
    9/126 - 56/126 = 9 - 56/126 = -47/126

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