Is (4y-8)cm divided by 2 equals to 4y-8cm over 2 and then a cm or is it (2y-4)cm?

(2y-4)cm

Step-by-step explanation:

In the given question we have (4y-8) divided by 2

which can be written mathematically as

Now (4y-8) is a quatity  with unit cm. and the whole expression is in parentheses. Moreover, two quatity can only be added or subtracted only when their units are same. Therefore 4y and 8 must have same unit that is cm.

Therefore, and not anything else