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Subtract 21/6 from 8/18

1st number: 8/18, 2nd number: 3 3/6

8/18 - 21/6 is -55/18.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 6 is 18
  2. For the 1st fraction, since 18 × 1 = 18,
    8/18 = 8 × 1/18 × 1 = 8/18
  3. Likewise, for the 2nd fraction, since 6 × 3 = 18,
    21/6 = 21 × 3/6 × 3 = 63/18
  4. Subtract the two fractions:
    8/18 - 63/18 = 8 - 63/18 = -55/18

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