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The number of fish decreases by x% each year. x% can also be written as 0.01x.
If the total number of fish in a lake is A, after one year the number of fish will be:
After two years the number of fish will be:
So, the general formula for the number of fish after n years can be written as:
It is given that after 8 years, the number of fish is reduced to half. So we can write:
This means the value of x is 8.3%. So, the number of fish in a lake decreases by 8.3% each year
If the total number of fish in a lake is A, after one year the number of fish will be:
After two years the number of fish will be:
So, the general formula for the number of fish after n years can be written as:
It is given that after 8 years, the number of fish is reduced to half. So we can write:
This means the value of x is 8.3%. So, the number of fish in a lake decreases by 8.3% each year