To convert 225 millimeters to dekameters, we can use the metric table.
1 dekameter = 10 meters 1 meter = 1,000 millimeters
First, we need to convert millimeters to meters:
225 millimeters = 225 mm × (1 meter / 1,000 mm) = 0.225 meters
Next, we convert meters to dekameters:
0.225 meters = 0.225 m × (1 dekameter / 10 meters) = 0.0225 dekameters
Thus, the answer is 0.0225 dekameters.