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Subtract 1/8 from 84/42

1st number: 2 0/42, 2nd number: 1/8

84/42 - 1/8 is 15/8.

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,
    84/42 = 84 × 4/42 × 4 = 336/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    1/8 = 1 × 21/8 × 21 = 21/168
  4. Subtract the two fractions:
    336/168 - 21/168 = 336 - 21/168 = 315/168
  5. After reducing the fraction, the answer is 15/8
  6. In mixed form: 17/8

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