Table: list of schools in the wellington region
Question: What percentage of schools in the Wellington region have a decile between 4 and 6?
Step 1 (Operation, Indexing): decile
Step 2 (Operation, Filter): decile between 4 and 6
Step 3 (Reasoning, Aggregating): COUNT, number of decile between 4 and 6
Step 4 (Reasoning, Arithmetic): percentage, decile between 4 and 6
Answer: 20%