Get percentage from results from two case results

How i can get percentage from two resuts from case staments? SELECT *, COUNT(CASE WHEN estado_rep >=11 and RELATION=1 THEN 1 ELSE NULL END) as pendiente, COUNT(CASE WHEN estado_rep >=11 and RELATION=2 THEN 1 ELSE NULL END) as realizada from AVERIES GROUP BY ID_AV Result query now aa bb cc pendiente realizada ----------- --------- --------- xxx xxx xxx 2 1 xxx xxx xxx 3 0 I want add a query percentage to root query. (realizada*100)/(realizada+pendiente) as Progress aa bb cc pendiente realizada progress -- -- -- --------- --------- -------- xxx xxx xxx 2 1 33% xxx xxx xxx 3 0 0% Thanks