Add a column which is a sum (or percentage) of all rows

[rippo]

I have the following step in my power query

= Table.Group(Source, {"CountryName"}, {{"Count", each List.Sum([CountOf]), type number}})

This works great and returns this

However I would like to create a third column which is either a total (sum) of all counts or even better a column showing a percentage of the current row against the total

Germany    914    7935
France      4203    7935

OR

Germany    914    11.5%
France      4203    52.9%

[HotChilli · Accepted solution]

Add a custom column similar to this

List.Sum(#"Grouped Rows"[summ])

where #Grouped Rows is the previous query step and [summ] is the column to be summed.

You can get the % once you have this. 

[Jimmy801 · Accepted solution]

Hello @rippo 

add a new column and paste this formula. ChangedType has to be replace with your last step

[Count]/List.Sum(ChangedType[Count])

Here the complete code

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45Wck8tyk3Mq1TSUbI0NFGK1YlWcitKzEtOBQqYGJkZgEWcMzLzEoEChuZGSrGxAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [CountryName = _t, Count = _t]),
    ChangedType = Table.TransformColumnTypes(Source,{{"CountryName", type text}, {"Count", Int64.Type}}),
    #"Added Custom" = Table.AddColumn(ChangedType, "%", each [Count]/List.Sum(ChangedType[Count]),Percentage.Type)
in
    #"Added Custom"

Copy paste this code to the advanced editor in a new blank query to see how the solution works.

If this post helps or solves your problem, please mark it as solution (to help other users find useful content and to acknowledge the work of users that helped you)
Kudoes are nice too

Have fun

Jimmy

[HotChilli · Accepted solution]

Add a custom column similar to this

List.Sum(#"Grouped Rows"[summ])

where #Grouped Rows is the previous query step and [summ] is the column to be summed.

You can get the % once you have this.