Calculations in DAX table

So I am creating this DAX table and i have defined two measure. 

"SumOfSeconds"

"SumOfCalls" 

Now I want to make a new column that divides these two columns. I tried to add another column to the table and use the Divide function to accomplish this but cant seem to figure it out. 

The Table definition I have so far is: 

ASA = GROUPBY(

'ReportC_Group Pefromacne By Date', DeptLink[Department], DimDate[Date],

"SumOfSeconds", Sumx(CURRENTGROUP(), ('ReportC_Group Pefromacne By Date'[Cmltv wait time before answered (Sec)])),

"SumOfCalls",Sumx(CURRENTGROUP(), ('ReportC_Group Pefromacne By Date'[ACD calls answered]))

)

Could anyone provide a little insight?