How to create stacked bar or column as a percentage?

Sometimes instead of looking at a stacked bar or column as raw numbers, it is more helpful to visualize the information as a percentage of the whole.  For example, out of the total stacked bar height, what percent does each element create.

This is simple in DataHero.  First create a stacked bar or column chart.  Typically done by adding a text, id, bool, etc. to a measure or date field.  You should have something like this:

Now, click the "%" button in the upper left to see each column as a percentage distribution of itself.