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Subtract 18/27 from 24/42

24/42 - 18/27 is -2/21.

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,
    24/42 = 24 × 9/42 × 9 = 216/378
  3. Likewise, for the 2nd fraction, since 27 × 14 = 378,
    18/27 = 18 × 14/27 × 14 = 252/378
  4. Subtract the two fractions:
    216/378 - 252/378 = 216 - 252/378 = -36/378
  5. After reducing the fraction, the answer is -2/21

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