Answers

Add 7/98 and 40/81

7/98 + 40/81 is 641/1134.

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,
   7/98 = 7 × 81/98 × 81 = 567/7938
3. Likewise, for the 2nd fraction, since 81 × 98 = 7938,
   40/81 = 40 × 98/81 × 98 = 3920/7938
4. Add the two like fractions:
   567/7938 + 3920/7938 = 567 + 3920/7938 = 4487/7938
5. 4487/7938 simplified gives 641/1134
6. So, 7/98 + 40/81 = 641/1134

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