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Subtract 20/40 from 16/54

16/54 - 20/40 is -11/54.

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,
    16/54 = 16 × 20/54 × 20 = 320/1080
  3. Likewise, for the 2nd fraction, since 40 × 27 = 1080,
    20/40 = 20 × 27/40 × 27 = 540/1080
  4. Subtract the two fractions:
    320/1080 - 540/1080 = 320 - 540/1080 = -220/1080
  5. After reducing the fraction, the answer is -11/54

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