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Subtract 27/8 from 15/21

1st number: 15/21, 2nd number: 3 3/8

15/21 - 27/8 is -149/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 8 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 21 × 8 = 168,
    15/21 = 15 × 8/21 × 8 = 120/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    27/8 = 27 × 21/8 × 21 = 567/168
  4. Subtract the two like fractions:
    120/168 - 567/168 = 120 - 567/168 = -447/168
  5. After reducing the fraction, the answer is -149/56

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