Dynamic String Format

Hi,

While this is not a direct answer to your question, my suggestion would be to transform your data in a form that creates seperate columns for each metric.  This M code does that

let
    Source = Excel.Workbook(File.Contents("C:\Users\Ashish Mathur\Downloads\Dynamic String Question.xlsx"), null, true),
    Sheet1_Sheet = Source{[Item="Sheet1",Kind="Sheet"]}[Data],
    #"Promoted Headers" = Table.PromoteHeaders(Sheet1_Sheet, [PromoteAllScalars=true]),
    #"Changed Type" = Table.TransformColumnTypes(#"Promoted Headers",{{"State Level Metric", type text}, {"Month End Date", type date}, {"Numberator", Int64.Type}, {"Denominator", Int64.Type}, {"Value", type number}, {"Column6", type any}, {"Column7", type any}, {"Column8", type any}}),
    #"Removed Columns" = Table.RemoveColumns(#"Changed Type",{"Numberator", "Denominator", "Column6", "Column7", "Column8"}),
    #"Pivoted Column" = Table.Pivot(#"Removed Columns", List.Distinct(#"Removed Columns"[#"State Level Metric"]), "State Level Metric", "Value"),
    #"Changed Type1" = Table.TransformColumnTypes(#"Pivoted Column",{{"State wide concern raised - Type A - %", Percentage.Type}})
in
    #"Changed Type1"

Hope this helps.