1. 5/8 of the staff are male and 5/12 of the staff works part-time in the aquarium. What fraction of the staff is female?

2. The shark is fed three times a day. During the morning feeding, 2/15 of a ton of fish is fed. During the afternoon feeding, the weight of fish fed will be 1/5 of a ton more than the fish fed during the morning. If the total weight of fish fed in a day is 1/2 of a ton, how much is fed during the feeding at night?


3. A baby otter was born. At birth, it weighs 7/8 kg and after a month, a 9/10 kg was added to its weight. What is the otter's total weight?



4. The penguin nursery is open two times a day: 2/3 hour at noon and 5/12 hour in the afternoon. How much time is the penguin nursery open every day?

5. Two kinds of fish can be found in a small tank that is 5 1/7 feet long. The blue fish is 2/15 feet long and the orange fish is 7/10 feet long. How much longer is the orange fish?