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Subtract 8/6 from 1/21

1st number: 1/21, 2nd number: 1 2/6

1/21 - 8/6 is -9/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 6 is 42

    Next, find the equivalent fraction of both fractional numbers with denominator 42
  2. For the 1st fraction, since 21 × 2 = 42,
    1/21 = 1 × 2/21 × 2 = 2/42
  3. Likewise, for the 2nd fraction, since 6 × 7 = 42,
    8/6 = 8 × 7/6 × 7 = 56/42
  4. Subtract the two like fractions:
    2/42 - 56/42 = 2 - 56/42 = -54/42
  5. After reducing the fraction, the answer is -9/7

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