Children are required by law to attend school until they reach a certain age, which varies by state (typically 16–18 years), unless an absence is formally excused by a school official or the child has been expelled.
because the deniminator (bottom) is 4 you have to simplify it down to 2, because that's the lowest you can go. 720/2 is 360 (2 is the lowest that it can go) and 4/2 is 2
