Table: b'z discography
Question: Which B'z album has the highest ratio of 1st week sales to total copies sold?
Step 1 (Operation, Indexing): 1st week sales and copies sold
Step 2 (Reasoning, Arithmetic): ratio, 1st week sales and copies sold
Step 3 (Reasoning, Aggregating): MAX, ratio between 1st week sales and copies sold
Step 4 (Operation, Indexing): album
Answer: monster