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Subtract 7/9 from 63/21

1st number: 3 0/21, 2nd number: 7/9

63/21 - 7/9 is 20/9.

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,
    63/21 = 63 × 3/21 × 3 = 189/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    7/9 = 7 × 7/9 × 7 = 49/63
  4. Subtract the two fractions:
    189/63 - 49/63 = 189 - 49/63 = 140/63
  5. After reducing the fraction, the answer is 20/9
  6. In mixed form: 22/9

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