Answers

Add 84/21 and 35/27

1^st number: 4 0/21, 2^nd number: 1 8/27

84/21 + 35/27 is 143/27.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 27 is 189
   
   Next, find the equivalent fraction of both fractional numbers with denominator 189
2. For the 1st fraction, since 21 × 9 = 189,
   84/21 = 84 × 9/21 × 9 = 756/189
3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
   35/27 = 35 × 7/27 × 7 = 245/189
4. Add the two like fractions:
   756/189 + 245/189 = 756 + 245/189 = 1001/189
5. 1001/189 simplified gives 143/27
6. So, 84/21 + 35/27 = 143/27
   In mixed form: 58/27

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