We have to first find relation between centimeter and decimeter here.
Centimeter and decimeter can be related as follows:
10 centimeter =1 decimeter
or
1 centimeter = 0.1 decimeter
Now converting 154 centimeter into decimeter using unitary method:
1 centimeter = 0.1 decimeter
154 centimeter = 0.1 *154 decimeter
Answer :
154 centimeter = 15.4 decimeter
