how to calculate crude fertility rate
Submit. Â· just now. Report Abuse. to find birth rate, you need to divide the number of new borns(in a year) on the entire population and multiply it by 1000, the unit will be: per mille; or by 100, the unit will be percent %.you do the same thing to find death rate (you divide number of deaths in one year...ubmit. Â· just now. Report Abuse. to find birth rate, you need to divide the number of new borns(in a year) on the entire population and multiply it by 1000, the unit will be: per mille; or by 100, the unit will be percent %.you do the same thing to find death rate (you divide number of deaths in one year...