Adam could fit 10 action figures on each shelf in his room. His room has could hold 8 action figures. How many total shelves did his room have?
First, we need to find how many action figures can fit in Adam's room. His room can hold 8 action figures, so we can say that the total number of action figures that can fit in his room is 8. 

Next, we need to find how many shelves Adam's room has. 10 action figures can fit on each shelf, and 8 action figures can fit in his room, so the total number of shelves that Adam's room has is 8/10, which is the same as 4/5. 

Therefore the answer (numeric) is: 

4/5