Answers

Add 28/21 and 72/21

1^st number: 1 7/21, 2^nd number: 3 9/21

28/21 + 72/21 is 100/21.

Steps for adding fractions

1. Add the two fractions:
   28/21 + 72/21 = 28 + 72/21 = 100/21
2. So, 28/21 + 72/21 = 100/21
   In mixed form: 416/21

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