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Subtract 42/21 from 1/6

1st number: 1/6, 2nd number: 2 0/21

1/6 - 42/21 is -11/6.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 6 and 21 is 42
  2. For the 1st fraction, since 6 × 7 = 42,
    1/6 = 1 × 7/6 × 7 = 7/42
  3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
    42/21 = 42 × 2/21 × 2 = 84/42
  4. Subtract the two fractions:
    7/42 - 84/42 = 7 - 84/42 = -77/42
  5. After reducing the fraction, the answer is -11/6

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