Death Rate is the actual rate of death where Crude Death Rate is a guess on the death rate.

Crude birth rate is how many live children are born. Crude death rate is how many people die. Crude death minus crude birth is the net gain (or loss) and is called the birth rate. It represents whether or not deceased people are "replaced".

Is the crude birth rate minus the crude death rate of a population

10.39

In that country, a lot of children are born and a lot of people die over average.