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Subtract 30/54 from 12/45

12/45 - 30/54 is -13/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 54 is 270
  2. For the 1st fraction, since 45 × 6 = 270,
    12/45 = 12 × 6/45 × 6 = 72/270
  3. Likewise, for the 2nd fraction, since 54 × 5 = 270,
    30/54 = 30 × 5/54 × 5 = 150/270
  4. Subtract the two fractions:
    72/270 - 150/270 = 72 - 150/270 = -78/270
  5. After reducing the fraction, the answer is -13/45

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