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Subtract 15/9 from 24/21

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

24/21 - 15/9 is -11/21.

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,
    24/21 = 24 × 3/21 × 3 = 72/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    15/9 = 15 × 7/9 × 7 = 105/63
  4. Subtract the two fractions:
    72/63 - 105/63 = 72 - 105/63 = -33/63
  5. After reducing the fraction, the answer is -11/21

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