At a convention, 16 of 36 delegates arrived with pre-printed name badges. Half of the remaining delegates made their own, hand-written name badges. How many delegates were not wearing name badges?
There were 36-16=<T>subtract(36, 16)=20 without pre-printed name badges.
Then 20/2=<T>divide(20, 2)=10.0 made hand-written badges
There were 20-10=<T>subtract(20, 10)=10 with no name badge.
