Spelling errors in a text are either "nonword errors" or "word errors." A nonword error produces a string of letters that is not a word, as when "the" is typed as "teh." Word errors produce the wrong word, as when "loose" is typed as "lose." Nonword errors make up 30% of all errors. A human proofreader will catch 94% of nonword errors and 73% of word errors.
What percent of all errors will the proofreader catch? (Hint: make a tree diagram.) (Round your answer to the nearest whole answer.)