There were 5 roses and 8 orchids in the vase. Jessica cut some more roses and orchids from her flower garden. There are now 20 orchids and 3 roses in the vase. How many more orchids than roses are there in the vase now?
There were 5 roses and 8 orchids in the vase. 
Jessica cut some more roses and orchids from her flower garden. 
There are now 20 orchids and 3 roses in the vase. 

There are now 17 more orchids than roses in the vase.