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Subtract 15/21 from 14/18

14/18 - 15/21 is 4/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 21 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 18 × 7 = 126,
    14/18 = 14 × 7/18 × 7 = 98/126
  3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
    15/21 = 15 × 6/21 × 6 = 90/126
  4. Subtract the two like fractions:
    98/126 - 90/126 = 98 - 90/126 = 8/126
  5. After reducing the fraction, the answer is 4/63

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