Question

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 1

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. So

60 fish - 1

x fish - 0.75

$x = 60*0.75$

$x = 45$

This population, the population is 45 fish.

Answer 2

Answer:

Number of fish remaining this year will be 45.

Step-by-step explanation:

Given information:

The decrement in number of fish = 25%

Number of fish previous year = 60

Then , the remaining number of fish $F$ will be 75%

Hence ,

$F=0.75 \times 60\\F=45$

Hence, number of fish remaining this year will be 45.

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