Spotlights on Health and Rights

Key topics in the Heilbrunn Department of Population and Family Health



A ratio is simply any number divided by another number. The most commonly invoked ratio in demography is certainly the sex ratio, the number of males per 100 females. But other ratios are also commonly used. For example, the old-age dependency ratio relates the number of people over age 65 to the number of people aged 18-65 (i.e., people in the workforce).