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Subtract 4/27 from 15/42

15/42 - 4/27 is 79/378.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 27 is 378
  2. For the 1st fraction, since 42 × 9 = 378,
    15/42 = 15 × 9/42 × 9 = 135/378
  3. Likewise, for the 2nd fraction, since 27 × 14 = 378,
    4/27 = 4 × 14/27 × 14 = 56/378
  4. Subtract the two fractions:
    135/378 - 56/378 = 135 - 56/378 = 79/378

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