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Subtract 42/48 from 49/63

49/63 - 42/48 is -7/72.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 48 is 1008

    Next, find the equivalent fraction of both fractional numbers with denominator 1008
  2. For the 1st fraction, since 63 × 16 = 1008,
    49/63 = 49 × 16/63 × 16 = 784/1008
  3. Likewise, for the 2nd fraction, since 48 × 21 = 1008,
    42/48 = 42 × 21/48 × 21 = 882/1008
  4. Subtract the two like fractions:
    784/1008 - 882/1008 = 784 - 882/1008 = -98/1008
  5. After reducing the fraction, the answer is -7/72

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