Question

In an aquarium, ⅖ of the fish are surgeonfish. Of these, ¾ are yellow tangs. What portion of all fish in the aquarium are yellow tangs?

Answer 1

So. 2/5 of the fish are surgeon fish. Meaning that 40% of the fish are surgeonfish. From that 40%, the 75% are yellow tangs. So the 75% of that 40% equals to 30% of all fish (since (3/4)*(2/5)=3/10)

So the aquarium has 30% OR 3/10 of its fish being yellow tangs