Answers

Add 25/81 and 4/45

25/81 + 4/45 is 161/405.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 45 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 81 × 5 = 405,
   25/81 = 25 × 5/81 × 5 = 125/405
3. Likewise, for the 2nd fraction, since 45 × 9 = 405,
   4/45 = 4 × 9/45 × 9 = 36/405
4. Add the two like fractions:
   125/405 + 36/405 = 125 + 36/405 = 161/405
5. So, 25/81 + 4/45 = 161/405

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