Four fifths of what?
1 century = 10 decades.
One is five fifths. Five fifths and four fifths is nine fifths.
There are 4......
Its 10. 10 decades = 1 century.
There are 5 decades in half a century.
10 decades in 1 century
Ten decades are in a century.
There are 20 decades.
There are eight tenths in four fifths.
Learn your math...JK 6 and four fifths is written like so: 6.4 so two fifths.
A century is 100 years. A decade is 10 years. Therefore to work out how many decades are in a century, you need to divide 100 by 10 which = 10. Therefore there are 10 decades in a century.