Tim won a $100 raffle.  He gave away 20% to his friend.  How much did he keep?
Тим дар лотерея $100 бурд. Вай 20% -и онро ба дӯсти худ дод. Вай чанд пул нигоҳ дошт?
How much did he give away? ** He gave away 100*.2=$<<100*.2=20>>20
How much did he keep? ** So he kept 100-20=$<<100-20=80>>80
#### 80
How much did he give away? ** He gave away 100*.2=$<<100*.2=20>>20  
How much did he keep? ** So he kept 100-20=$<<100-20=80>>80  
#### 80