3 birds were sitting on the fence. 6 more storks and 2 more birds came to join them. How many more storks than birds are sitting on the fence?
There are 3 birds sitting on the fence. 

6 more storks come to join them. 

That means there are now 9 birds and storks sitting on the fence. 

2 more birds come to join them. 

That means there are now 11 birds and storks sitting on the fence. 

There are more storks than birds sitting on the fence.