Answers

Add 12/15 and 21/15

1^st number: 12/15, 2^nd number: 1 6/15

12/15 + 21/15 is 11/5.

Steps for adding fractions

1. Add the two fractions:
   12/15 + 21/15 = 12 + 21/15 = 33/15
2. 33/15 simplified gives 11/5
3. So, 12/15 + 21/15 = 11/5
   In mixed form: 21/5

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