A controlling interest is when a parent company owns 50% to 100% of a subsidiary.
Minority interest is a term used to describe the ownership of a company by someone other than the parent company.
Minority interest is calculated by subtracting the parent company's ownership stake from 100%. For example, if the parent company owns 75% of the subsidiary, then the minority interest would be 25%. This can be expressed as a formula: Minority Interest = 100% - Parent Company's Ownership Stake