error message when copying data to another table

Hello everyone, I hope you are well; Please help, I am trying to copy some values ​​expressed in percentage from one table to another table through an action but when I try it I get this warning.

“The expression is valid but its result type ‘List’ is not one of the expected types: Percent”

I appreciate if you can help me

The result of your calculation is a list and that’s why it throws this message. What is your formula?