100% British English- You are as British as a bowler hat and a pin-stripe suit. In other words, you are more British than most young British people!
90% British English- You might think you can pass as British, but not quite! Your English is something like Gwyneth Paltrow or Renee Zellweger playing a British character.
About 70% British- Are you Australian?
50/50- You are very confused
About 70% American- Do you also like maple syrup? You must be Canadian
90% American- You are as American as apple pie (they also have apple pie in England, they just don’t make such a big thing about it)
100% American- You are as American as a Texan cowboy