$12\%$ of the mammals at the aquarium are otters. All of the otters are either sea otters or river otters. $40\%$ of the otters are sea otters. What percent of the mammals at the aquarium are river otters?
Update: Solved it!. The answer was 7.2. So sorry for wasting your time!
svar jeg tror det er 60$%er flododre