Question

In a town zoo, 3/28 of the animals are birds. Of the birds, 4/15 are birds of prey. What fraction of the animals at the zoo are birds of prey?

Answer 1

I got : `1/35`

Explanation:

We can consider that the birds of prey will be:

`cancel(3)/28*4/cancel(15)^5=`

`=cancel(4)/cancel(28)^7*1/5=1/(7×5)=1/35`

Try with numbers, say, `700` animals in total:

So that `700×1/35=20`