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Subtract 6/9 from 6/7

6/7 - 6/9 is 4/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 9 is 63
  2. For the 1st fraction, since 7 × 9 = 63,
    6/7 = 6 × 9/7 × 9 = 54/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    6/9 = 6 × 7/9 × 7 = 42/63
  4. Subtract the two fractions:
    54/63 - 42/63 = 54 - 42/63 = 12/63
  5. After reducing the fraction, the answer is 4/21

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