Answers

Subtract 15/42 from 56/81

56/81 - 15/42 is 379/1134.

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,
   56/81 = 56 × 14/81 × 14 = 784/1134
3. Likewise, for the 2nd fraction, since 42 × 27 = 1134,
   15/42 = 15 × 27/42 × 27 = 405/1134
4. Subtract the two like fractions:
   784/1134 - 405/1134 = 784 - 405/1134 = 379/1134

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