In the town zoo, 3/28 of the animals are birds. of the birds, 4/15 are birds of prey. what fraction of the animals are birds of prey?

Let's call the animals "a" and birds "b"

b=

we knot this from3/28 of the animals are birds.

and we also know that 4/15 are birds of prey.  so

p=

we could substitute:

p=

and solve:

p=
and this is the answer!