SSRS Expression divide by zero error

Hi, I am getting an error in SSRS calculating the field that potentially divide by zero. may i ask your help to fix this issue. thanks.

=First(Fields!CEQ_all.Value, "DailyUpdates_DS") = value is zero
=Sum(Fields!Prod_Plan_Yield.Value, "DailyUpdates_DS")= value is 0.16


--This is the codes in my field expression
=IIF(First(Fields!CEQ_all.Value, "DailyUpdates_DS")>Sum(Fields!Prod_Plan_Yield.Value, "DailyUpdates_DS"),Sum(Fields!Prod_Plan_Yield.Value, "DailyUpdates_DS")/First(Fields!CEQ_all.Value, "DailyUpdates_DS"),1)