Answers

Add 30/40 and 21/40

30/40 + 21/40 is 51/40.

Steps for adding fractions

1. Add the two fractions:
   30/40 + 21/40 = 30 + 21/40 = 51/40
2. So, 30/40 + 21/40 = 51/40
   In mixed form: 111/40

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