Answers

Add 18/21 and 15/21

18/21 + 15/21 is 11/7.

Steps for adding fractions

1. Add the two fractions:
   18/21 + 15/21 = 18 + 15/21 = 33/21
2. 33/21 simplified gives 11/7
3. So, 18/21 + 15/21 = 11/7
   In mixed form: 14/7

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