a decade is a period of ten years, while a century is a period of 100 years.
A decade is a time period of ten years.
4.5 decades equals 4.5 decades!
No, you don't need a hyphen. It would be 10 decades or ten decades.
100 decades in a millennium
There are 3.5 decades in 35 years
30 decades
There are 10.6 decades. Or 10 decades plus 6 years.
16.7 decades
There are 20 decades.
fifty decades
1.2 decades
70 decades
1 decade is 10 years which means 9 decades is 90 years. (10x9) 1 decade= 10 years (10x1) 2 decades= 20 years (10x2) 3 decades= 30 years (10x3) 4 decades= 40 years (10x4) 5 decades= 50 years (10x5) 6 decades= 60 years (10x6) 7 decades= 70 years (10x7) 8 decades= 80 years (10x8) 9 decades= 90 years (10x9) 10 decades= 100 years (10x10)