Vincent was predicted to have what percentage risk of having ADD?

In the context of GATTACA, the film explores a future society where genetic engineering determines an individual's potential for various traits, including predispositions to certain conditions. Vincent, the protagonist, was seen as having a high genetic risk for having Attention Deficit Disorder (ADD). The notion that Vincent would have an 89% risk fits into the narrative of the story, which underscores the societal implications and prejudices associated with genetic determinism.

This percentage indicates that he was deemed almost certain to exhibit traits associated with ADD based on genetic analysis, yet it is not absolute, reflecting the complexities of genetics and environment in influencing one's behavior and abilities. The portrayal of Vincent's character, who surpasses the genetic expectations placed upon him, serves as a commentary on the limitations of relying solely on genetic predispositions to predict individual outcomes. This reinforces the theme of the film that genetics does not wholly define a person’s identity or capabilities.