Final answer:
The 'A' classification items in an A-B-C inventory system typically represent about 20 percent of the total number of items in inventory, accounting for a large part of the consumption value.
Step-by-step explanation:
In an A-B-C inventory system, items are categorized based on their importance to the business, typically in terms of consumption value and stock movement frequency. 'A' items represent the most valuable products, generally constituting a smaller percentage of the inventory but accounting for a large portion of the consumption value. The typical percentage of the number of types of items in inventory that represent the 'A' classification is about 20 percent, although this can vary between companies. These items require more tight control and frequent review of stock levels.