What would it be ?

Question

In fishery scence, a cohort the collection of fish that results from one annual reproduction. It is usually assumed that the number of fish N(t) alive after years is given by an exponential function. For Pacific halibut, N(t) = N_{0} * e ^ (- 0.2t) where N_{0} the size of the cohort, Approximate the percentage of the original number still alive after 19 years,Express your answer as a percent, as requested, correct to three decimal places .

Answer 1

N(19)/N(0) = e^(-.2 x19)= e^-3.8= .02237077

If you round and express as a percent you get 2.237%