To convert millimeters to centimeters, you need to know the conversion factor. There are 10 millimeters in a centimeter. Therefore, to convert millimeters to centimeters, you divide the number of millimeters by 10.
For example, to convert 25 mm to cm, you would perform the following calculation:
25 mm ÷ 10 = 2.5 cm
So, 25 mm is equal to 2.5 cm.