You can also do this using PowerQuery.The steps are as follows:
- Merge columns name1 & perc1, name2 & perc2 , name3 & perc3, using a delimeter (say equalsign). Now your left with 4 columns.
- Right-click column [code] and select
Unpivot Other Columns
- Right-click column [Attribute] and select
Remove
- Right-click column [Value] and select
Split Columns
=> By Delimeter
=> OK
- Using the dropdown-menu in Column [Value.2]: deselect the null values.
- Rename column [Value.1] and [Value.2]
- Click
Close & Load
This is the result in PowerQuery (just before step 7)

And this is the generated script from the Advanced Editor:
let
Source = Excel.CurrentWorkbook(){[Name="Table"]}[Content],
#"Changed Type" = Table.TransformColumnTypes(Source,{{"code", Int64.Type}, {"name1", type text}, {"perc1", Int64.Type}, {"name2", type text}, {"perc2", Int64.Type}, {"name3", type text}, {"perc3", Int64.Type}}),
#"Merged Columns" = Table.CombineColumns(Table.TransformColumnTypes(#"Changed Type", {{"perc1", type text}}, "en-US"),{"name1", "perc1"},Combiner.CombineTextByDelimiter("=", QuoteStyle.None),"Merged"),
#"Merged Columns1" = Table.CombineColumns(Table.TransformColumnTypes(#"Merged Columns", {{"perc2", type text}}, "en-US"),{"name2", "perc2"},Combiner.CombineTextByDelimiter("=", QuoteStyle.None),"Merged.1"),
#"Merged Columns2" = Table.CombineColumns(Table.TransformColumnTypes(#"Merged Columns1", {{"perc3", type text}}, "en-US"),{"name3", "perc3"},Combiner.CombineTextByDelimiter("=", QuoteStyle.None),"Merged.2"),
#"Unpivoted Other Columns" = Table.UnpivotOtherColumns(#"Merged Columns2", {"code"}, "Attribute", "Value"),
#"Removed Columns" = Table.RemoveColumns(#"Unpivoted Other Columns",{"Attribute"}),
#"Split Column by Delimiter" = Table.SplitColumn(#"Removed Columns", "Value", Splitter.SplitTextByDelimiter("=", QuoteStyle.Csv), {"Value.1", "Value.2"}),
#"Changed Type1" = Table.TransformColumnTypes(#"Split Column by Delimiter",{{"Value.1", type text}, {"Value.2", Int64.Type}}),
#"Filtered Rows" = Table.SelectRows(#"Changed Type1", each ([Value.2] <> null)),
#"Renamed Columns" = Table.RenameColumns(#"Filtered Rows",{{"Value.1", "Name1"}, {"Value.2", "Perc1"}})
in
#"Renamed Columns"