Calculating % increase as dollar value - DAX

Hello tamerji,

Thanks for your response. I have added the above calculations and measures however the

$ margin increase amount is the same value as margin amount.

See below:

YearMonth Sequential Number = 
RANKX (
    'Table1',
    YEAR ('Table1'[Dt Invoice]) * 100
        + MONTH ( 'Table1'[Dt Invoice] ),
    ,
    ASC,
    DENSE
)

Measure

$ MArgine Increase = 
VAR CurrentMonth =
    MAX ( Table1[YearMonth Sequential Number] )
VAR CurrentMonthRevenue = 'Table1'[Measure : TOTAL Revenue]
VAR CurrentMonthMarginPercent = [Measure : Margin %]
VAR PreviousMonthMarginPercent =
CALCULATE([Measure : Margin %],Table1[YearMonth Sequential Number]=CurrentMonth-1)
RETURN
    CurrentMonthRevenue * ( CurrentMonthMarginPercent - PreviousMonthMarginPercent )

Margin $ measure

Measure : Total Margin = Table1[Measure : TOTAL Revenue]-Table1[Measure : Total Oncosts]

I then tried to calculate current margin % and Prior month Matgin % and add these to the matrix to see if they are calculating correctly.

The current margin % measure below matches the same calculation [Measure : Margin %]

Current Month % = CALCULATE(
divide(Table1[Measure : Total Margin],
Table1[Measure : TOTAL Revenue],0), 
Table1[YearMonth Sequential Number])

 Prior month % - does not pull through the previous month - it just duplicates the current month %

Prior Month % = 
VAR CurrentMonthMargin = CALCULATE([Measure : Margin %], Table1[YearMonth Sequential Number])
VAR PriorMonthMargin = CALCULATE([Measure : Margin %], Table1[YearMonth Sequential Number] -1) 
RETURN
PriorMonthMargin

Apologies in advance, are you able to identfy where I am going wrong?

many thanks in advance