A Level Business: H431: How do I calculate the ratios? OCR Customer Support 28 November 2019 15:23 Updated All of the ratios and their formula can be found in the guide to the financial accounting area of study Download Related articles A Level Business: Which topics are assessed in which A Level paper? A Level Business: What format is used for the final accounts? AS and A Level Business: Do students need to show their workings when doing calculations? Comments 0 comments Article is closed for comments.