The Short Version
The cited percentages combine incompatible categories and do not establish that white South Africans own 90% of the country’s land. The 90% figure covers holdings by individuals, companies, and trusts of all races, while white individuals’ 72% share applies only to individually owned farms and agricultural holdings—roughly 22% of South Africa’s total landmass. White South Africans also comprise about 7.3% of the population, not 10%.