A researcher had undertaken to study the effect of unhealthy alcohol use on the development of fatty liver disease in adults of a small town in rural Pennsylvania, with a population of 11,000 people. She found 2800 individuals who have unhealthy alcohol use, out of whom 800 developed fatty liver disease. Out of 8200 people, who are either non-alcoholics or who use alcohol moderately, she found out that 200 individuals developed fatty liver disease. What percentage of cases due to fatty liver disease could be prevented if individuals in this small town quit unhealthy alcohol use?
