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Subtract 40/56 from 12/15

12/15 - 40/56 is 3/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 56 is 840
  2. For the 1st fraction, since 15 × 56 = 840,
    12/15 = 12 × 56/15 × 56 = 672/840
  3. Likewise, for the 2nd fraction, since 56 × 15 = 840,
    40/56 = 40 × 15/56 × 15 = 600/840
  4. Subtract the two fractions:
    672/840 - 600/840 = 672 - 600/840 = 72/840
  5. After reducing the fraction, the answer is 3/35

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