Answers

Add 18/81 and 84/70

1^st number: 18/81, 2^nd number: 1 14/70

18/81 + 84/70 is 64/45.

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,
   18/81 = 18 × 70/81 × 70 = 1260/5670
3. Likewise, for the 2nd fraction, since 70 × 81 = 5670,
   84/70 = 84 × 81/70 × 81 = 6804/5670
4. Add the two like fractions:
   1260/5670 + 6804/5670 = 1260 + 6804/5670 = 8064/5670
5. 8064/5670 simplified gives 64/45
6. So, 18/81 + 84/70 = 64/45
   In mixed form: 119/45

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