Complex sentence: This "7% -38% -55% rule" has been overly interpreted in such a way, that some people claim that in any communication situation, the meaning of a message was being transported mostly by non-verbal cues, not by the meaning of words.
Split into simpler sentences: This "7% -38% -55% rule" has been widely misinterpreted. It is often claimed that in any communication, the meaning of a message is conveyed mmainly by non-verbal cues, not by the meaning of words.