By definition you cannot (or at least should not) have negative numbers in
this type of chart. It's like trying to show negative numbers in a pie
chart. You could expand the Y axis of your chart so it shows negative
numbers, and the chart will show X% negative and (100-X)% positive. In your
case, 100% doesn't go from 0% to 100%, it goes from -20% to 80%.

Without knowing more about your data, it's anyone's guess how better to show
the data. Perhaps a clustered chart.

- Jon
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Jon Peltier, Microsoft Excel MVP
Peltier Technical Services, Inc.
http://PeltierTech.com/WordPress/
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"Stuck" wrote in message
...
How do you create a 100% stacked column chart with negative numbers?
After I
create the chart it only goes up to 80%