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Subtract 4/63 from 5/42

5/42 - 4/63 is 1/18.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 63 is 126
  2. For the 1st fraction, since 42 × 3 = 126,
    5/42 = 5 × 3/42 × 3 = 15/126
  3. Likewise, for the 2nd fraction, since 63 × 2 = 126,
    4/63 = 4 × 2/63 × 2 = 8/126
  4. Subtract the two fractions:
    15/126 - 8/126 = 15 - 8/126 = 7/126
  5. After reducing the fraction, the answer is 1/18

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