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Subtract 9/56 from 8/21

8/21 - 9/56 is 37/168.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 56 is 168
  2. For the 1st fraction, since 21 × 8 = 168,
    8/21 = 8 × 8/21 × 8 = 64/168
  3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
    9/56 = 9 × 3/56 × 3 = 27/168
  4. Subtract the two fractions:
    64/168 - 27/168 = 64 - 27/168 = 37/168

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