John weighs 220 pounds when he starts exercising.  He manages to lose 10% of his body weight.  He then gains back 2 pounds.  How much does he weigh at the end?
He lost 220*.1=<<220*.1=22>>22 pounds
So after gaining some weight back he was 22-2=<<22-2=20>>20 pounds lighter than before
So his weight is 220-20=<<220-20=200>>200 pounds
#### 200