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Subtract 35/36 from 6/21

6/21 - 35/36 is -173/252.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 36 is 252
  2. For the 1st fraction, since 21 × 12 = 252,
    6/21 = 6 × 12/21 × 12 = 72/252
  3. Likewise, for the 2nd fraction, since 36 × 7 = 252,
    35/36 = 35 × 7/36 × 7 = 245/252
  4. Subtract the two fractions:
    72/252 - 245/252 = 72 - 245/252 = -173/252

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