Dividing one query by another query

Hi,

I have this query:

SELECT [Org Level Dept],SUM([Direct Labor Hours]) AS [Direct Labor Hours] FROM (
SELECT 
pehCurHrs AS [Direct Labor Hours], 
pehOrgLvl1 AS [Org Level 1],    
pehOrgLvl2 AS [Org Level 2],
Rtrim(pehOrgLvl2) + Right(pehOrgLvl1,3) AS [Org Level Dept]
FROM EmpPers JOIN pearhist ph ON ph.pehEEID = eepEEID 
where pehPerControl > '201301011' 
AND pehearncode = '0001'
) X
GROUP BY [Org Level Dept]
ORDER BY [Org Level Dept]

Need to divide by the hours in this very similar query:

SELECT [Org Level Dept],SUM([Premium Labor Hours]) AS [Premium Labor Hours] FROM (
SELECT 
pehCurHrs AS [Premium Labor Hours], 
pehOrgLvl1 AS [Org Level 1],    
pehOrgLvl2 AS [Org Level 2],
Rtrim(pehOrgLvl2) + Right(pehOrgLvl1,3) AS [Org Level Dept]
FROM EmpPers JOIN pearhist ph ON ph.pehEEID = eepEEID 
where pehPerControl > '201301011' 
AND pehearncode = '0002'
) X
GROUP BY [Org Level Dept]
ORDER BY [Org Level Dept]

I need to divide the 'premium labor hours' by the 'direct labor hours' and have it broken out by 'org level dept'. So that I have the total precentage by org level dept (but only where there is a matching org level dept).

Been trying all kinds of different ways..can't get the right results.

qeqw