It was much lower than 97%, maybe closer to 50%. She had at least three different variations of red/black outfits, excluding the New Avengers outfit here. There were also her Wakanda (black jacket, red top) and Seoul outfits (black top, red shawl), though I'm drawing a black on what her first Sokovia outfit looked like. The main red jacket outfit didn't show up until they were heading back to Sokovia for the big battle (someone correct me if I'm wrong here... I just remember Pietro grabbing the jacket and throwing it to Wanda on the Quinjet). But Marvel plastered the costume all over the promotional material, so it was undeniably the primary costume they wanted to associate with her.
Just a nitpick.