Answers

Subtract 5/81 from 15/42

15/42 - 5/81 is 335/1134.

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,
   15/42 = 15 × 27/42 × 27 = 405/1134
3. Likewise, for the 2nd fraction, since 81 × 14 = 1134,
   5/81 = 5 × 14/81 × 14 = 70/1134
4. Subtract the two like fractions:
   405/1134 - 70/1134 = 405 - 70/1134 = 335/1134

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