Answers

Add 15/90 and 20/90

15/90 + 20/90 is 7/18.

Steps for adding fractions

1. Add the two fractions:
   15/90 + 20/90 = 15 + 20/90 = 35/90
2. 35/90 simplified gives 7/18
3. So, 15/90 + 20/90 = 7/18

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