The following steps explain how a cashier can give a customer a percentage discount on their whole order:
After a product(s) has been ordered, in the Order section, select Process Order.
An Order Overview screen will be displayed showing all the products contained in an order.
By the right side, tap on Add discount.
Tap on the drop-down button/arrow by the right, select Percentage.
Type out the percentage to be given to the customer using the numbers displayed.
Select CONFIRM.
The percentage discount given will be calculated by the system and the result can be seen at the bottom of the screen.