10. Think centi as in cents, and deci as in dimes.
1 decimeter = 10 centimeter 1 centimeter = 0.1 decimeter
12 decimeters is1200 millimeters or 120 centimeters or 1.2 meters. Greetings from the metric world
0.1
There are 10 decimetres in one metre. Therefore, 15 centimetres is equal to 15 / 10 = 1.5 decimetres.
400 centimeters