What percentage of knowledge can be broken down to vocabulary?

I’m not sure knowledge of vocabulary as a percentage of all knowledge can be calculated. I think it’s safe to say that the larger the vocabulary, the more knowledge a person has. They are directly proportional.

Knowledge is experiential. It isn’t vocabulary.

I have absolutely no idea how to answer your question, but I do have 2 random vocab comments: Merriam-Webster’s “How Strong is Your Vocabulary” is a lot of fun, and the Tik Tok thread “What word did you mispronounce once and it still haunts you” is fantastic (mostly because, as a lifelong avid reader, I have a tremendous number of vocab words that I’ve never heard pronounced).