SELECT h.feature_name,
cast((count (distinct h.id_for_vendor)) as float)
/
cast((SELECT count(distinct  id_for_vendor)
FROM public.facetune2_device_info_log) as float)*100 as helpPerFeature
FROM public.Facetune2_usage_help_closed as h
group by h.feature_name
order by count (distinct h.id_for_vendor) desc;