in reply to Please Help! This is a class assignment given to me.
Please see Elementary arithmetic as well as Percentage for a point to start. If this is too much effort you may ask your local favorite pizza dealer for a practical example.
«The Crux of the Biscuit is the Apostrophe»
perl -MCrypt::CBC -E 'say Crypt::CBC->new(-key=>'kgb',-cipher=>"Blowfish")->decrypt_hex($ENV{KARL});'Help
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