As an example, set your data up as follows assuming the below:
(1) The letters are in column A
(2) The numbers are in column B
(3) The percentages are in column C
a 4 25%
b 3 19%
c 4 25%
d 5 31%
Create a Clustered Column Chart. Double-click on the columns and in the
Format Data Series dialog box go to the Data Labels tab and check “Label
contains Valueâ€. When complete, you should have data labels for all of the
bars.
Again, in the Format Data Series dialog box go to the Options tab. Set the
Overlap to 100%. When complete you should have the percentage bars at the
very bottom of the number bars.
Next, double-click on the percentage bars and in the Format Data Series
dialog box go to the patterns tab. Set the border to “None†and the area to
“Noneâ€.
At this point, all you have to do is move the data labels to where you want
them on the chart.