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Subtract 10/8 from 7/42

1st number: 7/42, 2nd number: 1 2/8

7/42 - 10/8 is -13/12.

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,
    7/42 = 7 × 4/42 × 4 = 28/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    10/8 = 10 × 21/8 × 21 = 210/168
  4. Subtract the two like fractions:
    28/168 - 210/168 = 28 - 210/168 = -182/168
  5. After reducing the fraction, the answer is -13/12

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