Answers

Subtract 56/81 from 12/42

12/42 - 56/81 is -230/567.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 81 is 1134
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1134
2. For the 1st fraction, since 42 × 27 = 1134,
   12/42 = 12 × 27/42 × 27 = 324/1134
3. Likewise, for the 2nd fraction, since 81 × 14 = 1134,
   56/81 = 56 × 14/81 × 14 = 784/1134
4. Subtract the two like fractions:
   324/1134 - 784/1134 = 324 - 784/1134 = -460/1134
5. After reducing the fraction, the answer is -230/567

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