A decade is a period of 10 years, while a century is a span of 100 years.
To put it simply, if you think of a decade as a single unit of time, it’s like one-tenth of a century. For example, the years from 2010 to 2019 represent a decade, while the years from 2000 to 2099 encompass a century.
This difference is crucial in understanding how we organize time and structure our history, as decades often represent cultural shifts and significant events, whereas centuries can signify larger historical changes over a longer timeframe.