Last year he was 86.314% as fast, 84.76% as quick with his first step, and could jump 85.003% as high as he can now.

It' a WAG, Dude, a way of describing that he was not fully recovered, yet mostly recovered, but closer to fully recovered than half strength. It also considers his preoccupation with his recovery last year that is not apparent now.

Those of us who like to think in terms of numbers tend to estimate probabilities and verbal measuring terms with percentages. How would you describe it?

Nothing exact about it. Maybe KC got to 91.5% at some point or never got past 82.3%. It's a way of explaining judgment.

Do you give your doctors a bad time when they ask you to estimate your pain on a scale of 1 to 10? If you haven't been asked that question, you will get it someday. Senior level scientists describe stuff this way.