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Subtract 27/42 from 4/9

4/9 - 27/42 is -25/126.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 42 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 9 × 14 = 126,
    4/9 = 4 × 14/9 × 14 = 56/126
  3. Likewise, for the 2nd fraction, since 42 × 3 = 126,
    27/42 = 27 × 3/42 × 3 = 81/126
  4. Subtract the two like fractions:
    56/126 - 81/126 = 56 - 81/126 = -25/126

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