Expressing shareholder impairment as a percentage (specifically 100%), is circular reasoning and, most conveniently does not require valuing the company.
In any case, the number must be expressed as a dollar amount and not a percentage, precisely in the same manner as required on any tax form.
The IRS does not ask individuals or companies to express their gains or losses as percentages, they require them to be expressed as dollar amounts.
Register for free to join our community of investors and share your ideas. You will also get access to streaming quotes, interactive charts, trades, portfolio, live options flow and more tools.