Tim won a $100 raffle.  He gave away 20% to his friend.  How much did he keep? Let's think step by step and output the final answer after "####".
user
He gave away 100*.2=$<<100*.2=20>>20
So he kept 100-20=$<<100-20=80>>80
#### 80
Tim won a $100 raffle.  He gave away 20% to his friend.  How much did he keep?
train