RANKED: The 20 most successful fast-food chains right now

Fast-food chain are raking in billions of dollars every year.

But which chain rises above the rest?

QSR Magazine tracks the earnings of the biggest brands in the business, compiling data on chains' revenue for 2015. We used that information to create a graphic, ranking the 20 most successful restaurant chains around.

Unsurprisingly, when it comes to sales, no one is able to beat fast-food giant McDonald's.

Here's how the rest stacked up: