Answers

Add 21/63 and 12/63

21/63 + 12/63 is 11/21.

Steps for adding fractions

1. Add the two fractions:
   21/63 + 12/63 = 21 + 12/63 = 33/63
2. 33/63 simplified gives 11/21
3. So, 21/63 + 12/63 = 11/21

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