Profitability ratios - Gross Profit Margin, Net Profit Margin, Operating Profit Margin and Pre Tax Margin explained in hindi. They are also called as Gross Profit ratio, Net Profit ratio and Operating Profit ratio. These return on sales ratios. Similarly, we also have return on investment (ROI) ratios like return on assets (ROA), return on capital employed (ROCE) and Return on Equity (ROE). -------------------------------------------------------------------------------------------