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Subtract 7/81 from 42/2

1st number: 21 0/2, 2nd number: 7/81

42/2 - 7/81 is 1694/81.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 81 is 162
  2. For the 1st fraction, since 2 × 81 = 162,
    42/2 = 42 × 81/2 × 81 = 3402/162
  3. Likewise, for the 2nd fraction, since 81 × 2 = 162,
    7/81 = 7 × 2/81 × 2 = 14/162
  4. Subtract the two fractions:
    3402/162 - 14/162 = 3402 - 14/162 = 3388/162
  5. After reducing the fraction, the answer is 1694/81
  6. In mixed form: 2074/81

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