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Subtract 90/18 from 12/30

1st number: 12/30, 2nd number: 5 0/18

12/30 - 90/18 is -23/5.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 18 is 90
  2. For the 1st fraction, since 30 × 3 = 90,
    12/30 = 12 × 3/30 × 3 = 36/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    90/18 = 90 × 5/18 × 5 = 450/90
  4. Subtract the two fractions:
    36/90 - 450/90 = 36 - 450/90 = -414/90
  5. After reducing the fraction, the answer is -23/5

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