Answers

Subtract 10/42 from 10/81

10/81 - 10/42 is -65/567.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 42 is 1134
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1134
2. For the 1st fraction, since 81 × 14 = 1134,
   10/81 = 10 × 14/81 × 14 = 140/1134
3. Likewise, for the 2nd fraction, since 42 × 27 = 1134,
   10/42 = 10 × 27/42 × 27 = 270/1134
4. Subtract the two like fractions:
   140/1134 - 270/1134 = 140 - 270/1134 = -130/1134
5. After reducing the fraction, the answer is -65/567

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