Change the value field settings to show the calculated values as a percentage of the Grand Total.

Sure, here are the steps to change the value field settings to show the calculated values as a percentage of the Grand Total:

1. Open your Pivot Table, and click anywhere in the data.

2. Go to the "Analyze" or "Options" tab in the Ribbon.

3. Click on the drop-down arrow next to "Fields, Items, & Sets".

4. Select "Calculated Field".

5. In the "Insert Calculated Field" dialog box, select the field that you want to change in the "Name" box.

6. In the "Formula" box, type "= 'Field Name' / Grand Total" (replace 'Field Name' with the name of your field).

7. Click "Add" to add the calculated field to the pivot table.

8. Click "OK" to close the dialog box.

9. Now, go to the "Value Field Settings".

10. In the "Value Field Settings" dialog box, select "% of Grand Total".

11. Click "OK".

Now, your pivot table should show the calculated values as a percentage of the Grand Total.