Question

The population of a school of fish decreases at a rate of 18% per month. There are currently500 fish in the school. How many fish will there be in 3 months?

Answer 1

Population decreasing rate is

18% monthly

Actual population = 500

Then

In 1 month decreases (500/100)• 18 = 90

Population = 500-90= 410

No find (410/100)•18 = 73.8

410-73.8= 336.2

In 3 months

(336.2/100) •18 = 60.5

336.2 - 60.5 = 276 fishes

ANSWER IS 276 fishes remain