Answers

Add 7/81 and 4/18

7/81 + 4/18 is 25/81.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 18 is 162
   
   Next, find the equivalent fraction of both fractional numbers with denominator 162
2. For the 1st fraction, since 81 × 2 = 162,
   7/81 = 7 × 2/81 × 2 = 14/162
3. Likewise, for the 2nd fraction, since 18 × 9 = 162,
   4/18 = 4 × 9/18 × 9 = 36/162
4. Add the two like fractions:
   14/162 + 36/162 = 14 + 36/162 = 50/162
5. 50/162 simplified gives 25/81
6. So, 7/81 + 4/18 = 25/81

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