# growth rate

• The population of a city of 100 people increases at an intrinsic rate of 0.1,but the city has accesses to food and housing for only 200 people what will the current growth rate of the population be?

• @Aria-Glamour
The population growth rate expresses the change in population size as a factor of time.
The standard formula for calculating growth rate is:

Gr= N / t

Here, Gr is the growth rate expressed as a number of individuals. N is the total change in population size for the entire time period, also expressed as a number of individuals. t is time, usually expressed in number of years. Of course, for really quickly growing populations, it might also be expressed in months or some other unit of time. The formula is calculated the same way regardless of the unit of time used.
In order to calculate the overall growth rate, you first have to figure out N. This is done by subtracting the initial population (or P1) from the current population, or the population at the end of the time period you are using (or P2). Therefore:

N= P2 - P1

• @Aria-Glamour

The population growth rate expresses the change in population size as a factor of time
. The standard formula for calculating growth rate is:

Gr= N / t

Here, Gr is the growth rate expressed as a number of individuals. N is the total change in population size for the entire time period, also expressed as a number of individuals. t is time, usually expressed in number of years. Of course, for really quickly growing populations, it might also be expressed in months or some other unit of time. The formula is calculated the same way regardless of the unit of time used.

In order to calculate the overall growth rate, you first have to figure out N. This is done by subtracting the initial population (or P1) from the current population, or the population at the end of the time period you are using (or P2). Therefore:

N= P2 - P1