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Subtract 15/7 from 63/21

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

63/21 - 15/7 is 6/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 7 is 21
  2. For the 1st fraction, since 21 × 1 = 21,
    63/21 = 63 × 1/21 × 1 = 63/21
  3. Likewise, for the 2nd fraction, since 7 × 3 = 21,
    15/7 = 15 × 3/7 × 3 = 45/21
  4. Subtract the two fractions:
    63/21 - 45/21 = 63 - 45/21 = 18/21
  5. After reducing the fraction, the answer is 6/7

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