Question

In a aquarium, 2/5 of the fish are surgeonfish. Of those surgeonfish, 3/4 are yellow tangs. What fraction of all the fish in the aquarium are not surgeonfish?

Answer 1

2/5 of the fish are surgeonfish

3/4 of the surgeonfish are yellow tags-

To find the number of fishes that are not surgeonfish, subtract the number of surgeonfish to the total (1)

1 - 2/5 = 5/5 -2/5 = 3/5

3/5 of all the fish are not surgeonfish