1/2 of 4 pies is 2 pies.
Just imagine 6 and 1/2 pizza pies. Now imagine cutting those pizza pies in half. 6x2=12+1 (that's one half) = 13/2. That is also equal to 26/4!!!
You took 2 apples from 3 apples. You now have 2 apples, and there is one left in the bag or wherever you took the 2 apples from.
If there are 10 apples and you take away 2, you would have 8 apples left. However, since you took 2 apples, you now possess those 2 apples. Therefore, you have 2 apples, while 8 apples remain with the original count.
You have 3 apples...