Stack Bar Graph of 100% Comparison

Dear gurus,
I’m trying to make stacked bar graphs, showing chronological change of ratio of two KPIs.
By using “Calculating share in percentages” option, you can set each KPIs as 100% bar graph, though it is unfortunatly impossible to set both KPI in one field as 100%.
If possible, I would prefer give it a section line as well.
Best,
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