Understanding the Total Dependency Ratio Denominator

The Total Dependency Ratio is a measure used in demography to compare the number of dependents (people too young or too old to work) to the working-age population.

Dependency Ratio Formula

The general formula for the Total Dependency Ratio is:

$ \text{Total Dependency Ratio} = \frac{(\text{Population < 15 years}) + (\text{Population > 64 years})}{\text{Population 15-64 years}} \times 100 $

Identifying the Denominator

In this formula:

• The numerator represents the dependent population (youth under 15 and aged 65 and over).
• The denominator represents the working-age population, which is the segment of the population considered economically active or available for work.

Based on standard demographic definitions, the working-age population is typically defined as individuals aged 15 to 64 years. Therefore, the population aged 15–64 years constitutes the denominator in the Total Dependency Ratio calculation.