Keep right formatting at slicer

Hi,

I have a bar chart with a slicer. This slicer contains several measures with Currencies, Percentages and numerical values. 
The blue line is the delta % in comparison to last year. 

The issue is that the left y-axis does not contain the right formatting (currency/percentage or numerical) with the current method. I tried to use solutions in this link: https://community.fabric.microsoft.com/t5/DAX-Commands-and-Tips/DAX-FORMAT-with-SWITCH/m-p/1396503 , but it did not work out. 
Also, I tried to use this link https://amitchandak.medium.com/power-bi-power-bi-create-dynamic-slicers-using-field-parameters-202587d4dedb
This works, however I am unable to use this for the Delta % measure. The DAX for the Delta % can you see below. 

Delta % YoY = 
VAR CurrentYear = SELECTEDVALUE('Date'[Year])
VAR Period = SELECTEDVALUE('Date'[Period])
VAR PreviousYear = SELECTEDVALUE('Date'[Year])-1

VAR CurrentPeriodMetric = CALCULATE([Selected KPI],
    FILTER(ALL('Date'),
        'Date'[Year] = CurrentYear &&
         'Date'[Period] = Period))

VAR PreviousYearSamePeriodMetric = CALCULATE([Selected KPI],
    FILTER(ALL('Date'),
        'Date'[Year] = PreviousYear &&
         'Date'[Period] = Period))

RETURN (CurrentPeriodMetric-PreviousYearSamePeriodMetric)/PreviousYearSamePeriodMetric

Can someone help me out