We need to know first the next equivalence
1cm =10mm
in order words per centimeter, we have 10 mm
therefore If we want to know how many centimeters are in 275 mm we only need to divide the millimeters given between 10 and this operation will give us the number of centimeters
In order to convert 275 mm to cm
![\frac{275\operatorname{mm}\cdot1\operatorname{cm}}{10\text{ mm}}=27.5\text{ cm}]()
ANSWER
275mm=27.5cm