Answers

Add 27/28 and 28/81

27/28 + 28/81 is 2971/2268.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 81 is 2268
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2268
2. For the 1st fraction, since 28 × 81 = 2268,
   27/28 = 27 × 81/28 × 81 = 2187/2268
3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
   28/81 = 28 × 28/81 × 28 = 784/2268
4. Add the two like fractions:
   2187/2268 + 784/2268 = 2187 + 784/2268 = 2971/2268
5. So, 27/28 + 28/81 = 2971/2268
   In mixed form: 1703/2268

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