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?
A step-by-step solution is:
25
Marco has 500 * 0.

25 = 125 duplicate trading cards.

He wants to trade off 125 * 0.

2 = 25 cards for new ones.

.

Thus, the answer is 25