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Subtract 1/63 from 21/18

1st number: 1 3/18, 2nd number: 1/63

21/18 - 1/63 is 145/126.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 63 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 18 × 7 = 126,
    21/18 = 21 × 7/18 × 7 = 147/126
  3. Likewise, for the 2nd fraction, since 63 × 2 = 126,
    1/63 = 1 × 2/63 × 2 = 2/126
  4. Subtract the two like fractions:
    147/126 - 2/126 = 147 - 2/126 = 145/126
  5. In mixed form: 119/126

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