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Subtract 8/9 from 4/42

4/42 - 8/9 is -50/63.

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,
    4/42 = 4 × 3/42 × 3 = 12/126
  3. Likewise, for the 2nd fraction, since 9 × 14 = 126,
    8/9 = 8 × 14/9 × 14 = 112/126
  4. Subtract the two fractions:
    12/126 - 112/126 = 12 - 112/126 = -100/126
  5. After reducing the fraction, the answer is -50/63

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