Combine percentage formula with dynamic range

Hello,

I have created a dynamic name range called "Data".

It contains the following offset formula: =OFFSET('2019 Data'!$D$2,1,0,COUNTA('2019 Data'!$D:$D)-2,4)

I would like to combine a percentage formula the "Data" range So that my empty fields calculate through a range:
A B C
1 Sales 1 sales 3 sales 3

=b1/a1-1(Data) is not working out. Please help

There isnt really a "percentage" formula per say. All a percentage is, is something along the lines of "how many did divided by how many could"
eg how many voted compared to the voter population

To best describe or illustrate your problem you would be better off attaching a dummy workbook. The workbook should contain the same structure and some dummy data of the same type as the type you have in your real workbook - so, if a cell contains numbers & letters in this format abc-123 then that should be reflected in the dummy workbook.

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