simple: 15
explanation: 1 decimeter = 10 centimeters
There are no such units as centimeteres or decimeteres!
1 decimetre = 10 centimetres so 1.5 decimetres = 1.5*10 = 15 centimetres. Simple!
15 centimeters = 150 millimeters
150 centimeters is 15 decimeters.
15
5 centimeters=0.5 decimeters
There are 10 centimeters in one decimeters.
700 centimeters is 70 decimeters.
There are 50 decimeters in 500 centimeters
480 centimeters is 48 decimeters.
900 decimeters is 9,000 centimeters.
17 centimeters = 1.7 decimeters
There are 2.5 decimeters in 25 centimeters.
10.2 centimeters is 1.02 decimeters.