This definition appears very rarely
Samples in periodicals archive:
The operating profit margin ratio indicates how much profit a company makes after paying for variable costs of production such as wages, raw materials, etc.
Operating Profit Margin ratio and Net Profit Margin Ratio measure in percentage terms, the profit being generated for each rupee of sales which the company makes.
Question: What is the operating profit margin ratio? Answer: The operating profit margin is a type of profitability ratio known as a margin ratio.