AbstractThe Profit and Loss Account is by definition the main source of information for studying the financial performance of the companies. Financial ratios describe the relationship between financial indicators, in general between a result and an effort for the company, in order to offer an image of the financial profitability, if we use the Profit and Loss account or financial position and an image of financial position if we use the Balance Sheet. The structure ratios of the Profit and Loss account have the capability to show in ratios companies’ income and expenses, comparing the different positions of the Profit and Loss account. If this analysis is made in dynamics, in a few years, we can obtain specific information on companies’ per...