How many decades are there in a century

a century is 100 years 100 is 10 squared so there is 10 decades. also a decade   is ten years

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.

sitting in that one chair where he could get shot at was his worst decision.