No it isn't. 100 years is a century. 1000 years is a millennium.

A millennium is 1000 years. A decade is 10 years. Thus there are 1000 / 10 = 100 decades in a millennium.

1 decade = 10 years

⇒ 10 decades = 10 x 10 years = 100 years

1000 years = 1 millennium

⇒ 10 decades = 100 years

= 100 ÷ 1000 millennium

= 1/10 millennium

= 0.1 millennium

It is equal to one millennium which is a 1000 years because a decade is 10 years and 100*10 = 1000 years

A millennium is 1000 years. A century is 100 years. So a millennium (1000 years) is equal to 10 centuries.