Answers

Add 70/20 and 5/81

1^st number: 3 10/20, 2^nd number: 5/81

70/20 + 5/81 is 577/162.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 81 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 20 × 81 = 1620,
   70/20 = 70 × 81/20 × 81 = 5670/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   5/81 = 5 × 20/81 × 20 = 100/1620
4. Add the two like fractions:
   5670/1620 + 100/1620 = 5670 + 100/1620 = 5770/1620
5. 5770/1620 simplified gives 577/162
6. So, 70/20 + 5/81 = 577/162
   In mixed form: 391/162

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