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Subtract 5/21 from 6/9

6/9 - 5/21 is 3/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 21 is 63

    Next, find the equivalent fraction of both fractional numbers with denominator 63
  2. For the 1st fraction, since 9 × 7 = 63,
    6/9 = 6 × 7/9 × 7 = 42/63
  3. Likewise, for the 2nd fraction, since 21 × 3 = 63,
    5/21 = 5 × 3/21 × 3 = 15/63
  4. Subtract the two like fractions:
    42/63 - 15/63 = 42 - 15/63 = 27/63
  5. After reducing the fraction, the answer is 3/7

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