Answers

Add 15/35 and 12/81

15/35 + 12/81 is 109/189.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 35 and 81 is 2835
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2835
2. For the 1st fraction, since 35 × 81 = 2835,
   15/35 = 15 × 81/35 × 81 = 1215/2835
3. Likewise, for the 2nd fraction, since 81 × 35 = 2835,
   12/81 = 12 × 35/81 × 35 = 420/2835
4. Add the two like fractions:
   1215/2835 + 420/2835 = 1215 + 420/2835 = 1635/2835
5. 1635/2835 simplified gives 109/189
6. So, 15/35 + 12/81 = 109/189

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