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Subtract 20/63 from 8/54

8/54 - 20/63 is -32/189.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 63 is 378
  2. For the 1st fraction, since 54 × 7 = 378,
    8/54 = 8 × 7/54 × 7 = 56/378
  3. Likewise, for the 2nd fraction, since 63 × 6 = 378,
    20/63 = 20 × 6/63 × 6 = 120/378
  4. Subtract the two fractions:
    56/378 - 120/378 = 56 - 120/378 = -64/378
  5. After reducing the fraction, the answer is -32/189

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