Answers

Add 84/4 and 15/81

1^st number: 21 0/4, 2^nd number: 15/81

84/4 + 15/81 is 572/27.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 81 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 4 × 81 = 324,
   84/4 = 84 × 81/4 × 81 = 6804/324
3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
   15/81 = 15 × 4/81 × 4 = 60/324
4. Add the two like fractions:
   6804/324 + 60/324 = 6804 + 60/324 = 6864/324
5. 6864/324 simplified gives 572/27
6. So, 84/4 + 15/81 = 572/27
   In mixed form: 215/27

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