He gave away 100*.2=$<<100*.2=20>>20

So he kept 100-20=$<<100-20=80>>80

# Answer

80
Question:
Tim won a $100 raffle.  He gave away 20% to his friend.  How much did he keep?
Answer:
Let's think step by step.

user
80
Tim won a $100 raffle.  He gave away 20% to his friend.  How much did he keep?
train