<human>:  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?
<bot>: How many duplicate trading cards does Marco have? ** Marco has 500*0.25=<<500*0.25=125>>125 duplicate trading cards.
How many cards does Marco want to trade off? ** He wants to trade off 125*0.2=<<125*0.2=25>>25 cards for new ones.
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