Answers

Add 3/81 and 42/56

3/81 + 42/56 is 85/108.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 56 is 4536
   
   Next, find the equivalent fraction of both fractional numbers with denominator 4536
2. For the 1st fraction, since 81 × 56 = 4536,
   3/81 = 3 × 56/81 × 56 = 168/4536
3. Likewise, for the 2nd fraction, since 56 × 81 = 4536,
   42/56 = 42 × 81/56 × 81 = 3402/4536
4. Add the two like fractions:
   168/4536 + 3402/4536 = 168 + 3402/4536 = 3570/4536
5. 3570/4536 simplified gives 85/108
6. So, 3/81 + 42/56 = 85/108

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