Firstly, I would like to explain which scenario is suit for using waterfull chart. The waterfall chart shows a running total as values are added or subtracted. For more information, please refer to this article: Tutorial: Waterfall charts in Power BI.
In your scenario, to calculate percentage for each Acct Status, we need to create two measures like below. The calculation of measure is different from the running mechanism of waterfall chart, so we are not able to display percentage values for each Acct Status in a waterfall chart. But we can display those two measures in a card or table.