Answers

Add 7/81 and 7/70

7/81 + 7/70 is 151/810.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 70 is 5670
   
   Next, find the equivalent fraction of both fractional numbers with denominator 5670
2. For the 1st fraction, since 81 × 70 = 5670,
   7/81 = 7 × 70/81 × 70 = 490/5670
3. Likewise, for the 2nd fraction, since 70 × 81 = 5670,
   7/70 = 7 × 81/70 × 81 = 567/5670
4. Add the two like fractions:
   490/5670 + 567/5670 = 490 + 567/5670 = 1057/5670
5. 1057/5670 simplified gives 151/810
6. So, 7/81 + 7/70 = 151/810

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