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Subtract 27/4 from 10/42

1st number: 10/42, 2nd number: 6 3/4

10/42 - 27/4 is -547/84.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 4 is 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 4 × 21 = 84,
    27/4 = 27 × 21/4 × 21 = 567/84
  4. Subtract the two fractions:
    20/84 - 567/84 = 20 - 567/84 = -547/84

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