Have you looked into using the waterfall chart to show this differential of percentages for the given time frame? The waterfall can show different colors based on positive or negative growth differentials.
I tried to open the link you provided but received the following error:
The following data source errors have been found:
ORION_STAR_SCHEMA_NOFORMAT: The data source contains no data items or is not available in memory. To restore the data source, contact your system administrator.
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