Some investors are looking for specific ratios as they peruse your business plan. They may only invest in businesses that have a 2:1 ratio of assets to liabilities, for example. If you know what these ratios are, you can include them in your plan.
Common business ratios include liquidity, debt, profitability, and market ratios. They are useful in comparing finances between industries, companies, time periods, and other business components. Chapter 19 includes more information on developing and using financial ratios in your business.