We calculate the tip, for both carryout and delivery orders, by multiplying the order's total by the selected percentage.
Delivery = (Subtotal + Tax + Delivery Fee) x Selected Percentage
Carryout = (Subtotal + Tax) x Selected Percentage
If you would like to adjust your gratuity, you can do so prior to checkout. You are also able to optionally select a flat dollar amount, rather than a percentage.