Why Is a Decade 10 Year's

The word is derived (via French and Latin) from the Ancient Greek: δεκάς, romanized: dekas, which means a group of ten. Decades may describe any ten-year period, such as those of a person’s life, or refer to specific groupings of calendar years.

Is 10 years a decade or century?

Answer: There are ten decades in a century. We know that in a decade, there are 10 years. We also know that in a century there are 100 years. Thus, simplifying it further, we get: 10 decades = 100 years = 1 century.

How long is 100 years called?

a centennial. a period of 100 years; century.