Answers

Add 20/98 and 18/81

20/98 + 18/81 is 188/441.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 98 and 81 is 7938
   
   Next, find the equivalent fraction of both fractional numbers with denominator 7938
2. For the 1st fraction, since 98 × 81 = 7938,
   20/98 = 20 × 81/98 × 81 = 1620/7938
3. Likewise, for the 2nd fraction, since 81 × 98 = 7938,
   18/81 = 18 × 98/81 × 98 = 1764/7938
4. Add the two like fractions:
   1620/7938 + 1764/7938 = 1620 + 1764/7938 = 3384/7938
5. 3384/7938 simplified gives 188/441
6. So, 20/98 + 18/81 = 188/441

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