Emma baked some muffins. 35 percent of the muffins are chocolate muffins and the rest are banana muffins. She baked a total of 80 muffins. How many banana muffins did she bake?

The number of chocolate muffins is 35/100 * 80 = <<35/100*80=28>>28 muffins.

The number of banana muffins is 80 - 28 = <<80-28=52>>52 muffins. Answer: \boxed{52}.