You analyze the company's financial records (balance sheet, profit/loss statement, tax returns, etc) and you figure out how much potential dollars you expect to add to the net profit. Then divide that by the number of owners, including you, and that should give you your percentage.
Above applies if you are not putting up cash to buy into the business.
If you are putting up cash you'll also be concerned with the book and market values of the business.
- The right of the people
- to keep and bear arms,
- shall not be infringed.