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Subtract 15/63 from 12/20

12/20 - 15/63 is 38/105.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 63 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 20 × 63 = 1260,
    12/20 = 12 × 63/20 × 63 = 756/1260
  3. Likewise, for the 2nd fraction, since 63 × 20 = 1260,
    15/63 = 15 × 20/63 × 20 = 300/1260
  4. Subtract the two like fractions:
    756/1260 - 300/1260 = 756 - 300/1260 = 456/1260
  5. After reducing the fraction, the answer is 38/105

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