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Subtract 50/63 from 18/42

18/42 - 50/63 is -23/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 63 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 42 × 3 = 126,
    18/42 = 18 × 3/42 × 3 = 54/126
  3. Likewise, for the 2nd fraction, since 63 × 2 = 126,
    50/63 = 50 × 2/63 × 2 = 100/126
  4. Subtract the two like fractions:
    54/126 - 100/126 = 54 - 100/126 = -46/126
  5. After reducing the fraction, the answer is -23/63

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