3/28 of animals are birds
of the birds: 4/15 are birds of prey
If you want to know what fraction of the animals at the zoo are birds of prey, you can calculate this using the following steps:
4/15 3/28 = 12 / (1528) = 1 / (5*7) = 1 / 35
Result: In the town zoo, 1/35 of animals are birds of prey.
