Below is an instruction that describes a task. Write a response that appropriately completes the request in French. Please answer in French.

### Instruction:
 Marco loves trading cards. He has a total of 500 cards on hand, and a fourth of them are duplicates. Marco decides to trade one-fifth of these duplicates for completely new cards to his friend Josh. How many new cards did Marco get?


### Response:
 Marco a 500*0,25=<<500*0.25=125>>125 cartes de collection en double.
Il veut échanger 125*0,2=<<125*0.2=25>>25 cartes contre de nouvelles.