To celebrate the first day of school, Megan brought in a tray of caramel brownies and walnut brownies. The tray had a total of 65 brownies, of which 20% were caramel. How many caramel brownies did Megan bring?

The number of caramel brownies is 20% of 65 brownies, or 0.2*65 = <<20*.01*65=13>>13 caramel brownies. Answer: \boxed{13}.