Population of 320 animals decreases at rate of 19 % = P = 320(0.81)t
What is percentage ?
Percentage means how much per hundredth.
we can write 20% as `1/5 in fraction. when we multiply a fraction by 100 we get the result in percentage.
In the given question
Population (P) = 320
Annual rate or per year decreasing percentage = 19%
As it decreases each year by 19% it retains (100 - 19)%= 81% of 320 animals
So in t years it will be P = 320([tex]\frac{81}{100}[/tex])t animals
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