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Subtract 6/8 from 5/42

5/42 - 6/8 is -53/84.

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,
    5/42 = 5 × 4/42 × 4 = 20/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    6/8 = 6 × 21/8 × 21 = 126/168
  4. Subtract the two fractions:
    20/168 - 126/168 = 20 - 126/168 = -106/168
  5. After reducing the fraction, the answer is -53/84

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