Question

A certain number of fish are swimming in a pond. A fisherman casts his net and 1/3 rd of the fish are caught in the net. After removing the catch from the net, he throws a second time. This time 1/4 th of the fish *remaining* in the pond are caught in the net. When he

throws the net a third time, 1/5 th of the fish *remaining* in the pond are caught in the net. If 300 fish are still swimming in the pond, what is the original number of fish in the pond ?

Answer 1

Answer:

450 is the answer

but I'm not sure