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Subtract 16/18 from 21/12

1st number: 1 9/12, 2nd number: 16/18

21/12 - 16/18 is 31/36.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 18 is 36
  2. For the 1st fraction, since 12 × 3 = 36,
    21/12 = 21 × 3/12 × 3 = 63/36
  3. Likewise, for the 2nd fraction, since 18 × 2 = 36,
    16/18 = 16 × 2/18 × 2 = 32/36
  4. Subtract the two fractions:
    63/36 - 32/36 = 63 - 32/36 = 31/36

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