No. A decade is ten years. Twenty years is two decades (or a "score" -- as in "Four score and seven years ago...").
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20 decade
years to decade=/10 years to century=/100 example: 20 years=____decade =( 20 / 10 )decade =2 decade Note: / means divide
There are 200 years in 20 decades
Yes, a decade is 10 years and 10 years x 20 = 200 years.
10 years is called a decade hence it is only a decade not decade of years