How do trade discounts and net price factore complement each other?

A trade discount is a discount on the list price granted by a manufacturer or wholesaler to buyers in the same trade.

The net price is the price a company actually pays for a product after the discount is deducted.

The net price factor is the net price written in percentage form.

List price = 100%

If the trade discount is 40%, the complement of the trade discount is 60% (100% - 40%). 60% is the net price factor in this example.

I believe this is what you are asking. The trade discount % and the net price factor will always equal 100%.