Answers

Add 28/63 and 27/81

28/63 + 27/81 is 7/9.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 81 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 63 × 9 = 567,
   28/63 = 28 × 9/63 × 9 = 252/567
3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
   27/81 = 27 × 7/81 × 7 = 189/567
4. Add the two like fractions:
   252/567 + 189/567 = 252 + 189/567 = 441/567
5. 441/567 simplified gives 7/9
6. So, 28/63 + 27/81 = 7/9

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