Burger King revamped its playbook. It's working.

Burger King saw its second-quarter US same-store sales jump 8.5%, significantly outperforming McDonald's, whose growth lagged at 0.8%, and Wendy's, which fell 7%. Rising prices have made fast food less reliable in terms of value, opening up competition from stores like Wawa and sit-down restaurants such as Chili's. Burger King also saw a 20% increase in Whopper sales after revamping the item by packaging it in a box instead of a wrapper.