Discount percentage determination system, discounted price presentation system, discount percentage determination method, and storage medium

A discount percentage determination method, comprising:

• acquiring, from a database in which residential areas and electronic payment information of consumers who made electronic payments are recorded in association with each other, the electronic payment information for each of the residential areas;
• and
• identifying a tendency of the electronic payments for each of the residential areas based on the electronic payment information for each of the residential areas and determining for each of the residential areas a discount percentage for prices of items for sale at a predetermined store according to the identified tendency.

A non-transitory storage medium storing instructions that are executable by one or more processors and that cause the one or more processors to perform functions comprising:

• acquiring, from a database in which residential areas and electronic payment information of customers who made electronic payments are recorded in association with each other, the electronic payment information for each of the residential areas;
• and
• identifying a tendency of the electronic payments for each of the residential areas based on the electronic payment information for each of the residential areas and determining for each of the residential areas a discount percentage for prices of items for sale at a predetermined store according to the identified tendency.