Question

If 8 individuals in a population of 80 butterflies die in a week, calculate the death rate of the population of butterflies during that period.

Answer 1

Death rate = `"Total number of death"/"Total population" xx 1000`

Thus, the death rate is equal to 100 deaths per 1000 individuals per week.

 It can be also calculated directly like

 It can be also calculated directly like.

8/80=0.1 deaths /week