Subtracting a Percentage from 1 in DAX

[Medo]

Good day Folks, Hope you're well!! 

I'm not a DAX man and I'm in a situation where I need to subtract a Percentage from 1, here is what I have : 

Event: A text Column Contains about 30 unique Values
OPE: A measure or equation: OPE = Deferral amount / [Deferral amount + Online Rate_MBD]

Online Rate_MBD: A column general value, summarization = Sum

Deferral amount: A coulmn with values 

I have this measure : 

deferral+online rate = SUMX(vw_ROO_Reporting_Losses,vw_ROO_Reporting_Losses[Deferral Amount]) + SUMX(tbl_OnlineSummary,tbl_OnlineSummary[Online Rate_MBD])

My Data Now plotted as below : 

I need to change the OPE to this equation :  1 - ( Deferral amount / [Deferral amount + Online Rate_MBD])
OR 1 - ([Deferral amount + Online Rate_MBD] / Online Rate_MBD)

If I just used 

1- DIVIDE(SUM(vw_ROO_Reporting_Losses[Deferral Amount]), [deferral+online rate])

it's showing that 

It seams that this happened becuse the value is more than 1 as below : 

Is there are any Ideas to fix this issue please ?

Your help is highly appreciated guys.. 

[Whitewater100]

Hello:

What about:

New Measure = 1 -[OPE]

and format as percent? Where OPE is a stand alone measure or variable.

[Medo]

Hello and thank you for your reply, unfortunately, I tried that already and the result is the same (

[Whitewater100]

Hi:

Can you share some example data for the tables involved? We can miss a lot if we don't see the model,relationships,etc.. That could help get your answer. Thanks.

P.S. I would suggest the DIVIDE function vs / character.