Answers

Add 4/84 and 30/81

4/84 + 30/81 is 79/189.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 81 is 2268
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2268
2. For the 1st fraction, since 84 × 27 = 2268,
   4/84 = 4 × 27/84 × 27 = 108/2268
3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
   30/81 = 30 × 28/81 × 28 = 840/2268
4. Add the two like fractions:
   108/2268 + 840/2268 = 108 + 840/2268 = 948/2268
5. 948/2268 simplified gives 79/189
6. So, 4/84 + 30/81 = 79/189

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