Simple add both scores and divide by 2
(97+97)/2 = 97
Since we dont know the decimals what's the point in that? Or what's the point in adding different console versions together? The game can be slightly different on different consoles.
And with BotW this would be: (96+97)/2 = 96,5
"The rumours of my death have been greatly exaggerated."
- Single-player Game