It's a measure of a company's overall profitability, i.e. how much of its sales are converting to profit. The value given is the amount of sales needed to generate one currency unit of post tax profit. Negative values mean that the company has a negative level of post tax profit. The figure is about the latest fiscal year available.
It's a key measure of success. The profit ratio measures the amount of profit generated by each single currency unit of sales. The figure is about the latest fiscal year available.