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Subtract 27/7 from 21/6

1st number: 3 3/6, 2nd number: 3 6/7

21/6 - 27/7 is -5/14.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 6 and 7 is 42
  2. For the 1st fraction, since 6 × 7 = 42,
    21/6 = 21 × 7/6 × 7 = 147/42
  3. Likewise, for the 2nd fraction, since 7 × 6 = 42,
    27/7 = 27 × 6/7 × 6 = 162/42
  4. Subtract the two fractions:
    147/42 - 162/42 = 147 - 162/42 = -15/42
  5. After reducing the fraction, the answer is -5/14

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