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Subtract 81/8 from 30/84

1st number: 30/84, 2nd number: 10 1/8

30/84 - 81/8 is -547/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 8 is 168
  2. For the 1st fraction, since 84 × 2 = 168,
    30/84 = 30 × 2/84 × 2 = 60/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    81/8 = 81 × 21/8 × 21 = 1701/168
  4. Subtract the two fractions:
    60/168 - 1701/168 = 60 - 1701/168 = -1641/168
  5. After reducing the fraction, the answer is -547/56

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