Answer:
99 11/15
Explanation:
1) Find a GCF. 10 and 6 have a GCF of 30.
Now, multiply 9/10 by 3 and 5/6 by 5.
You should have 26 27/30 and 72 25/30.
2) Add like-terms. Add 26 and 72, and add 27/30 and 25/30.
You should now have 98 52/30.
3) Simplify. 52/30 can be simplified to 1 22/30 by subtracting 30 from the top. Now, divide the top and bottom by 2.
Now, your answer is 99 11/15. Nothing more can be done.