It is 8,centimetres, exactly as in the question. A decimal representation does not imply a change in the measurement units.
20.000 centimeters
0.09 metres
4.06
There is 100 centimeters in every meter so 0.09 (0.9 would be 90 centimeters)
1 and 8 tenths as a decimal is 1.8
20.000 centimeters
108.00
0.09 metres
12 centimeters =
0.12 metres, possibly.
4.06
8 3/4 as a decimal is 8.75.
5,600.000... (as many zeros as you want to write)
There is 100 centimeters in every meter so 0.09 (0.9 would be 90 centimeters)
1 and 8 tenths as a decimal is 1.8
8% = 0.08
It is 8.08