Answers

Add 28/63 and 21/63

28/63 + 21/63 is 7/9.

Steps for adding fractions

1. Add the two fractions:
   28/63 + 21/63 = 28 + 21/63 = 49/63
2. 49/63 simplified gives 7/9
3. So, 28/63 + 21/63 = 7/9

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