Answers

Add 7/70 and 28/81

7/70 + 28/81 is 361/810.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 81 is 5670
   
   Next, find the equivalent fraction of both fractional numbers with denominator 5670
2. For the 1st fraction, since 70 × 81 = 5670,
   7/70 = 7 × 81/70 × 81 = 567/5670
3. Likewise, for the 2nd fraction, since 81 × 70 = 5670,
   28/81 = 28 × 70/81 × 70 = 1960/5670
4. Add the two like fractions:
   567/5670 + 1960/5670 = 567 + 1960/5670 = 2527/5670
5. 2527/5670 simplified gives 361/810
6. So, 7/70 + 28/81 = 361/810

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