Answers

Add 15/21 and 28/21

1^st number: 15/21, 2^nd number: 1 7/21

15/21 + 28/21 is 43/21.

Steps for adding fractions

1. Add the two fractions:
   15/21 + 28/21 = 15 + 28/21 = 43/21
2. So, 15/21 + 28/21 = 43/21
   In mixed form: 21/21

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