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Subtract 12/9 from 18/15

1st number: 1 3/15, 2nd number: 1 3/9

18/15 - 12/9 is -2/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 9 is 45
  2. For the 1st fraction, since 15 × 3 = 45,
    18/15 = 18 × 3/15 × 3 = 54/45
  3. Likewise, for the 2nd fraction, since 9 × 5 = 45,
    12/9 = 12 × 5/9 × 5 = 60/45
  4. Subtract the two fractions:
    54/45 - 60/45 = 54 - 60/45 = -6/45
  5. After reducing the fraction, the answer is -2/15

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