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Subtract 42/12 from 10/42

1st number: 10/42, 2nd number: 3 6/12

10/42 - 42/12 is -137/42.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 12 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 42 × 2 = 84,
    10/42 = 10 × 2/42 × 2 = 20/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    42/12 = 42 × 7/12 × 7 = 294/84
  4. Subtract the two like fractions:
    20/84 - 294/84 = 20 - 294/84 = -274/84
  5. After reducing the fraction, the answer is -137/42

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