How create pivot table or table that shows the change after refresh

Hi, 

By adding a calculated field to a pivot table, you can determine how much the value has changed from the previous one. Here's how you can do it-

1. Go to the PivotTable Field List.
2. Right-click the field that represents the total number of completed activities in the "Values" area and select "Value Field Settings."
3. In the "Value Field Settings" dialog box, select "Show Values As" and "% Difference From."
4. In the "Base Field" dropdown, select the field that you want to compare to (in your case, the "Month" field).
5. In the "Base Item" dropdown, select "Previous."
6. Click "OK" to create the calculated field.
7. Right-click on the calculated field in the Values area of the PivotTable.
8. Select "Value Field Settings" again.
9. In the "Value Field Settings" dialog box, select "Number Format."
10. Choose the number format that you prefer (e.g., "Number" with zero decimal places).
11. Click "OK" to apply the number format.

This should do it.