Answers

Add 21/63 and 28/63

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

Steps for adding fractions

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

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