Answers

Add 72/7 and 84/81

1^st number: 10 2/7, 2^nd number: 1 3/81

72/7 + 84/81 is 2140/189.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 81 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 7 × 81 = 567,
   72/7 = 72 × 81/7 × 81 = 5832/567
3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
   84/81 = 84 × 7/81 × 7 = 588/567
4. Add the two like fractions:
   5832/567 + 588/567 = 5832 + 588/567 = 6420/567
5. 6420/567 simplified gives 2140/189
6. So, 72/7 + 84/81 = 2140/189
   In mixed form: 1161/189

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