What is the demographic growth rate formula?

The demographic growth rate formula uses two fundamental variables: the entry of population - number of births and number of immigrants - and the exit of population - number of deaths and emigrants - in a given period and place.
A positive growth rate indicates that the population is growing, while a negative growth rate indicates that the population is decreasing.
The demographic growth rate formula can be expressed as follows: Tasa de crecimiento demográfico = (tasa de natalidad-tasa de mortalidad) + Saldo migratorio (Inmigraciones-emigraciones).