<p>
</p>
<p>This may be me being evasive, but I don’t want to give you a prescriptive / pedantic answer one way or the other. The ratio would be so highly dependent on the content of the essay and the style of the writer. I would only be able to evaluate once I read a given essay. Be wary of any advice that does give you a “definitive” answer, though I’m sure you know this as a creative writer. Are you an intended CW major?</p>