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Subtract 54/63 from 8/15

8/15 - 54/63 is -34/105.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 63 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 15 × 21 = 315,
    8/15 = 8 × 21/15 × 21 = 168/315
  3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
    54/63 = 54 × 5/63 × 5 = 270/315
  4. Subtract the two like fractions:
    168/315 - 270/315 = 168 - 270/315 = -102/315
  5. After reducing the fraction, the answer is -34/105

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