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Subtract 27/40 from 8/15

8/15 - 27/40 is -17/120.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 40 is 120
  2. For the 1st fraction, since 15 × 8 = 120,
    8/15 = 8 × 8/15 × 8 = 64/120
  3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
    27/40 = 27 × 3/40 × 3 = 81/120
  4. Subtract the two fractions:
    64/120 - 81/120 = 64 - 81/120 = -17/120

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