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Subtract 21/40 from 4/27

4/27 - 21/40 is -407/1080.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 27 and 40 is 1080

    Next, find the equivalent fraction of both fractional numbers with denominator 1080
  2. For the 1st fraction, since 27 × 40 = 1080,
    4/27 = 4 × 40/27 × 40 = 160/1080
  3. Likewise, for the 2nd fraction, since 40 × 27 = 1080,
    21/40 = 21 × 27/40 × 27 = 567/1080
  4. Subtract the two like fractions:
    160/1080 - 567/1080 = 160 - 567/1080 = -407/1080

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