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Subtract 27/7 from 4/21

1st number: 4/21, 2nd number: 3 6/7

4/21 - 27/7 is -11/3.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 7 is 21
  2. For the 1st fraction, since 21 × 1 = 21,
    4/21 = 4 × 1/21 × 1 = 4/21
  3. Likewise, for the 2nd fraction, since 7 × 3 = 21,
    27/7 = 27 × 3/7 × 3 = 81/21
  4. Subtract the two fractions:
    4/21 - 81/21 = 4 - 81/21 = -77/21
  5. After reducing the fraction, the answer is -11/3

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