User blog comment:RadioGuy42/How do I add up votes into percentage?/@comment-31004959-20170427032010

I haven't been very active on here lately but I think since neutrals count as oppose, you add up the total votes and then divide number of supports/opposes by that.

e.g. If something had 5 supports, 3 neutrals and 3 opposes, the support percentage would be 5/11 or 45%.