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Subtract 1/8 from 4/42

4/42 - 1/8 is -5/168.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 8 is 168
  2. For the 1st fraction, since 42 × 4 = 168,
    4/42 = 4 × 4/42 × 4 = 16/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    1/8 = 1 × 21/8 × 21 = 21/168
  4. Subtract the two fractions:
    16/168 - 21/168 = 16 - 21/168 = -5/168

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