Answer:
Amaro has the most cards
Explanation:
To solve this you just ahve to make comparissions between the different boyst that have the different cards, so if Agustin has only 1/4 as many cards as Mateo, Mateo has 3/4 more than Agustin, and If mateo has 1/2 as many cards as Amaro, then Amaro has more cards than Mateo, so the one that has the most cards out of the three of them would be Amaro.