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Subtract 16/45 from 21/12

1st number: 1 9/12, 2nd number: 16/45

21/12 - 16/45 is 251/180.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 45 is 180
  2. For the 1st fraction, since 12 × 15 = 180,
    21/12 = 21 × 15/12 × 15 = 315/180
  3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
    16/45 = 16 × 4/45 × 4 = 64/180
  4. Subtract the two fractions:
    315/180 - 64/180 = 315 - 64/180 = 251/180
  5. In mixed form: 171/180

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