Im doing a question for hexadecimal subtraction and I'm confused over how to do it. The question is 46h - 59h. The correct answer is EDh. I'm not sure how they got this. Like if you try to borrow from the 4 when you are subtracting then it becomes a 3 but then how are you suppose to subtract 3 - 5 when you have no other column to borrow from? Please help solve this for me. Here I have a pic below illustrating what I mean:

166-22-9-13 (0 in hex) th