Create one calculated field by adding all rows of one column in a table

[Saketh_Dutch]

I have a percentage column in a table. I have to add all the rows of this percentage column and display it in the home screen of the app. It has to update whenever a new row gets added in the table. How to add this field? 

[lynchk21]

Sounds like you could make a show type virtual column and then use the expression SUM(Table Name[Percentage Column])