Danny collects bottle caps and wrappers. He found w bottle caps and x wrappers at the park. Now he has y wrappers and z bottle caps in his collection. How many more wrappers than bottle caps does danny have now?
First, we need to find out how many wrappers Danny had in total. We know that he found w bottle caps and x wrappers at the park, and we know that he has y wrappers and z bottle caps in his collection. This means that the total number of wrappers Danny has must be x + y. 

Now, we need to find out how many bottle caps Danny has in total. We know that he found w bottle caps and x wrappers at the park, and we know that he has y wrappers and z bottle caps in his collection. This means that the total number of bottle caps Danny has must be w + z. 

Now, we need to find out how many more wrappers than bottle caps Danny has now. To do this, we need to subtract the total number of bottle caps from the total number of wrappers. We know that the total number of wrappers is x + y, and we know that the total number of bottle caps is w + z. This means that the difference must be (x + y) - (w + z). 

This means that Danny has (x + y) - (w + z) more wrappers than bottle caps now.