Answers

Add 81/21 and 9/21

1^st number: 3 18/21, 2^nd number: 9/21

81/21 + 9/21 is 30/7.

Steps for adding fractions

1. Add the two fractions:
   81/21 + 9/21 = 81 + 9/21 = 90/21
2. 90/21 simplified gives 30/7
3. So, 81/21 + 9/21 = 30/7
   In mixed form: 42/7

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