When you want to add both numeric values and percentage values in a graph column in Excel, you need to first add the numeric values. To do this, click on the cell where you want the numeric value to appear and then type in the number. Next, click on the "%" sign next to the cell. This will change the number into a percentage. Now, click on the "=" sign next to the cell and type in the number that you want to be divided by 100. This will give you the percentage value. Finally, click on the "Graph" tab and select "Column."