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Subtract 10/7 from 9/21

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

9/21 - 10/7 is -1/1.

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,
    9/21 = 9 × 1/21 × 1 = 9/21
  3. Likewise, for the 2nd fraction, since 7 × 3 = 21,
    10/7 = 10 × 3/7 × 3 = 30/21
  4. Subtract the two fractions:
    9/21 - 30/21 = 9 - 30/21 = -21/21
  5. After reducing the fraction, the answer is -1/1

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