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Subtract 90/18 from 12/45

1st number: 12/45, 2nd number: 5 0/18

12/45 - 90/18 is -71/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 18 is 90
  2. For the 1st fraction, since 45 × 2 = 90,
    12/45 = 12 × 2/45 × 2 = 24/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    90/18 = 90 × 5/18 × 5 = 450/90
  4. Subtract the two fractions:
    24/90 - 450/90 = 24 - 450/90 = -426/90
  5. After reducing the fraction, the answer is -71/15

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