Answers

Add 25/28 and 63/81

25/28 + 63/81 is 421/252.

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,
   25/28 = 25 × 81/28 × 81 = 2025/2268
3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
   63/81 = 63 × 28/81 × 28 = 1764/2268
4. Add the two like fractions:
   2025/2268 + 1764/2268 = 2025 + 1764/2268 = 3789/2268
5. 3789/2268 simplified gives 421/252
6. So, 25/28 + 63/81 = 421/252
   In mixed form: 1169/252

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