Making equal shares

I was learning to make equal shares (division.)  Now I know that equal shares are done by doubles\ halves and skip counting.  Heres a example 15/5 has 5 cars and 15 little people that want to get inside.  So the best one to use would be halves because you know 5+5=10+5=15 so it is 5 in each cars.  It was easy for me because it was to find equal shares and groups.