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Subtract 56/40 from 20/54

1st number: 20/54, 2nd number: 1 16/40

20/54 - 56/40 is -139/135.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 40 is 1080
  2. For the 1st fraction, since 54 × 20 = 1080,
    20/54 = 20 × 20/54 × 20 = 400/1080
  3. Likewise, for the 2nd fraction, since 40 × 27 = 1080,
    56/40 = 56 × 27/40 × 27 = 1512/1080
  4. Subtract the two fractions:
    400/1080 - 1512/1080 = 400 - 1512/1080 = -1112/1080
  5. After reducing the fraction, the answer is -139/135

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