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Subtract 30/8 from 35/42

1st number: 35/42, 2nd number: 3 6/8

35/42 - 30/8 is -35/12.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 8 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 42 × 4 = 168,
    35/42 = 35 × 4/42 × 4 = 140/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    30/8 = 30 × 21/8 × 21 = 630/168
  4. Subtract the two like fractions:
    140/168 - 630/168 = 140 - 630/168 = -490/168
  5. After reducing the fraction, the answer is -35/12

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