What is the rate of natural increase (RNI), and how can it be a negative number?
What will be an ideal response?
The RNI is calculated by subtracting the number of deaths (usually expressed as the crude death
rate) from the number of births (usually expressed as the crude birth rate) in a given year. For
example, consider that Place A has a crude death rate of 32 and a crude birth rate of 47.
Subtracting 32 from 47 gives a rate of natural increase of 15 per 1,000 population. Converting
that figure to a percentage produces the RNI as 1.5 percent. A negative number is possible when
the mean death rate is larger than the mean birth rate.
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