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Subtract 32/21 from 8/42

1st number: 8/42, 2nd number: 1 11/21

8/42 - 32/21 is -4/3.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 42
  2. For the 1st fraction, since 42 × 1 = 42,
    8/42 = 8 × 1/42 × 1 = 8/42
  3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
    32/21 = 32 × 2/21 × 2 = 64/42
  4. Subtract the two like fractions:
    8/42 - 64/42 = 8 - 64/42 = -56/42
  5. After reducing the fraction, the answer is -4/3

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