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Subtract 2/9 from 7/21

7/21 - 2/9 is 1/9.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 63
  2. For the 1st fraction, since 21 × 3 = 63,
    7/21 = 7 × 3/21 × 3 = 21/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    2/9 = 2 × 7/9 × 7 = 14/63
  4. Subtract the two like fractions:
    21/63 - 14/63 = 21 - 14/63 = 7/63
  5. After reducing the fraction, the answer is 1/9

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