The number of fish in a lake decreased by 25% between last year and this year. Last year there were 60 finish in the lake. what is the population this year?

Answer:This population, the population is 45 fish.Step-by-step explanation:This problem can be solved by a rule of three.Last year there were 60 fish in the lake. That was 100, that is, decimal 1.This year it decreased 25%. So there 100%-25% = 75%, that is decimal 0.75. So60 fish - 1x fish - 0.75[tex]x = 60*0.75[/tex][tex]x = 45[/tex]This population, the population is 45 fish.