Dividing Counts

I'm sorry if someone has already posted this but I've looked through a few pages to see if someone had already posted and I couldn't find anything. Anyways, I have two counts and I would like to divide them to get a percentage. Basically I would like to see a percentage of how many tickets are overdue. Here's my SQL:

select count(*)[No. of Tickets Overdue],
case
when sum(datepart(dd,getdate() - j.report_date))>= pt.due_hours then 'Over Due'
when sum(datepart(dd,getdate() - j.report_date))>= pt.due_hours then 'Over Due'
when sum(datepart(dd,getdate() - j.report_date))>= pt.due_hours then 'Over Due'
when sum(datepart(dd,getdate() - j.report_date))>= pt.due_hours then 'Over Due'
end [Ticket Status]
from whd.priority_type pt
inner join whd.job_ticket j on pt.priority_type_id = j.priority_type_id
where j.status_type_id = '1' and j.deleted = '0' and not j.priority_type_id = '5' and not j.priority_type_id = '6'
group by pt.due_hours
order by pt.due_hours desc
COMPUTE SUM(count(*))

select count(*)[Count2]
from whd.job_ticket jt
where jt.status_type_id = '1' and jt.deleted = '0'-- and not jt.priority_type_id = '5' and not jt.priority_type_id = '6'
--COMPUTE [No. of Tickets Overdue]/[Count2]

I know this isn't correct but basically the commented line at the bottom is what I want to do. I've only been doing SQL statements for a few months now, so I know its novice but any help is appreciated.
Thanks in advance.