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Subtract 21/9 from 6/21

1st number: 6/21, 2nd number: 2 3/9

6/21 - 21/9 is -43/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 9 is 63
  2. For the 1st fraction, since 21 × 3 = 63,
    6/21 = 6 × 3/21 × 3 = 18/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    21/9 = 21 × 7/9 × 7 = 147/63
  4. Subtract the two fractions:
    18/63 - 147/63 = 18 - 147/63 = -129/63
  5. After reducing the fraction, the answer is -43/21

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