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Subtract 50/54 from 27/42

27/42 - 50/54 is -107/378.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 54 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 42 × 9 = 378,
    27/42 = 27 × 9/42 × 9 = 243/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    50/54 = 50 × 7/54 × 7 = 350/378
  4. Subtract the two like fractions:
    243/378 - 350/378 = 243 - 350/378 = -107/378

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