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Subtract 30/54 from 12/90

12/90 - 30/54 is -19/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 54 is 270
  2. For the 1st fraction, since 90 × 3 = 270,
    12/90 = 12 × 3/90 × 3 = 36/270
  3. Likewise, for the 2nd fraction, since 54 × 5 = 270,
    30/54 = 30 × 5/54 × 5 = 150/270
  4. Subtract the two fractions:
    36/270 - 150/270 = 36 - 150/270 = -114/270
  5. After reducing the fraction, the answer is -19/45

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