Module:ImageRatio explained

local p=function p.ratio(frame) local file = frame.args[1] and mw.title.new('File:' .. mw.uri.decode(mw.ustring.gsub(frame.args[1],'%|.*$',), 'WIKI')) file = file and file.file local w = tonumber(file.width) or 1 local h = tonumber(file.height) or 1 local r = w/h or 1 return rendreturn p