Answers

Add 84/20 and 56/81

1^st number: 4 4/20, 2^nd number: 56/81

84/20 + 56/81 is 1981/405.

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,
   84/20 = 84 × 81/20 × 81 = 6804/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   56/81 = 56 × 20/81 × 20 = 1120/1620
4. Add the two like fractions:
   6804/1620 + 1120/1620 = 6804 + 1120/1620 = 7924/1620
5. 7924/1620 simplified gives 1981/405
6. So, 84/20 + 56/81 = 1981/405
   In mixed form: 4361/405

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