I want to know the answer to the following question:
What percent of the population are unable to eat unfermented milk-based foods?
All the background I'm provided with is that "Lactose intolerance varies widely by ethnic heritage; more than 90 percent of peoples of east Asian descent are lactose intolerant, in contrast to about 5 percent of people of northern European descent.". Is that enough to answer the question?
Answer: no