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Subtract 5/7 from 18/63

18/63 - 5/7 is -3/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 7 is 63

    Next, find the equivalent fraction of both fractional numbers with denominator 63
  2. For the 1st fraction, since 63 × 1 = 63,
    18/63 = 18 × 1/63 × 1 = 18/63
  3. Likewise, for the 2nd fraction, since 7 × 9 = 63,
    5/7 = 5 × 9/7 × 9 = 45/63
  4. Subtract the two like fractions:
    18/63 - 45/63 = 18 - 45/63 = -27/63
  5. After reducing the fraction, the answer is -3/7

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