Ava, Grace, Jayden, and Zoe together stacked a total of 50 brownies on a tray. Ava stacked 0.14 of the brownies, Grace stacked 4 of the 50 brownies, Jayden stacked 24% of the brownies, and Zoe stacked the remaining brownies. Who stacked the most brownies?
Ava stacked 0.14 x 50 = <<0.14*50=7>>7 brownies.
Jayden stacked 24/100 x 50 = <<24/100*50=12>>12 brownies.
So, Zoe stacked a total of 50 - 7 - 4 - 12 = <<50-7-4-12=27>>27 brownies.
Therefore, Jayden stacked the most brownies. Answer: \boxed{Jayden}.