Wikipedia has charts for many encodings. Your "é" was probably encoded using iso-8859-1, iso-8859-15 or Windows-1252.

If the text were to have been decoded, then you'd be dealing with Unicode codepoints. You can find the numbers of Unicode codepoints (in hex) on the Unicode code charts.

Another example, Unicode codepoint 20AC: "€":

iso-8859-15   A4
Windows-1252  80
UTF-8         E2 82 AC
UTF-16le      AC 20  (at an even offset)
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