Definition
Average ratio of list price to realized revenue for the selected set of transactions.
Formula
Discount % = (sum(list price)/sum(revenue)) - 1
Example
Total List Price for all filtered transactions is 1,000 and the total Revenue is 800.
Discount % = (Σ(List Price) / Σ(Revenue)) - 1
Discount % = (1,000 / 800) - 1 = 0.25 (25%).