Question

1/3 of the fish in the tank are snappers. 2/9 of the fish are catfish and the rest are goldfish. There are 40 goldfish in the tank. How many fish are in the tank ?

Answer 1

90 fish are in the tank

Answer 2

Find fraction of snappers and catfish:

1/3 + 2/9 = 3/9 + 2/9 = 5/9

Find fraction of goldfish:

1 - 5/9 = 4/9

4/9 = 40 goldfish

1/9 = 40 ÷ 4 = 10

9/9 = 10 x 9 = 90

Answer: 90 fish in the tank