Answers

Add 21/70 and 15/70

21/70 + 15/70 is 18/35.

Steps for adding fractions

1. Add the two fractions:
   21/70 + 15/70 = 21 + 15/70 = 36/70
2. 36/70 simplified gives 18/35
3. So, 21/70 + 15/70 = 18/35

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