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Subtract 30/63 from 6/18

6/18 - 30/63 is -1/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 63 is 126
  2. For the 1st fraction, since 18 × 7 = 126,
    6/18 = 6 × 7/18 × 7 = 42/126
  3. Likewise, for the 2nd fraction, since 63 × 2 = 126,
    30/63 = 30 × 2/63 × 2 = 60/126
  4. Subtract the two fractions:
    42/126 - 60/126 = 42 - 60/126 = -18/126
  5. After reducing the fraction, the answer is -1/7

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