21 red peaches, 211 yellow peaches and 27 green peaches are in the basket. How many more green peaches than red peaches are in the basket?
There are a total of 259 peaches in the basket. 

There are 21 red peaches in the basket. 

That means that there are 238 peaches that are not red. 

There are 211 yellow peaches in the basket. 

That means that there are 27 peaches that are not yellow. 

Since we know that there are 27 peaches that are not yellow, and we know that all of the peaches that are not yellow are green, we can say that there are 27 green peaches in the basket. 

Now we just need to compare the number of green peaches to the number of red peaches. 

There are 27 green peaches and 21 red peaches, which means that there are 6 more green peaches than red peaches in the basket.