Answers

Subtract 27/81 from 10/42

10/42 - 27/81 is -2/21.

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,
   10/42 = 10 × 27/42 × 27 = 270/1134
3. Likewise, for the 2nd fraction, since 81 × 14 = 1134,
   27/81 = 27 × 14/81 × 14 = 378/1134
4. Subtract the two like fractions:
   270/1134 - 378/1134 = 270 - 378/1134 = -108/1134
5. After reducing the fraction, the answer is -2/21

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