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To stay competitive, fast-food chains across America have to revamp their menus and redesign their stores almost as quickly as they prepare their food.
These days, top chains are doing everything possible to stay current and keep their customers coming back. That includes adding mobile ordering, self-service kiosks, and even alcohol at some locations.
Take a look at how some of America's most popular chains have evolved over the years.
Marina Nazario contributed to an earlier version of this post.
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Back in 1955, McDonald's offered 15-cent hamburgers.
McDonald's in 1955.
Hulton Archive/Getty Images
McDonald's packaging has gone through noticeable changes over the years.