James buys 20 coins of a cryptocurrency at $15 each.  The value of the coins increases by 2/3.  He sells coins to recoup his original investment.  How many coins did he sell?
How much did James invest? ** His original investment was 15*20=$<<15*20=300>>300
How much does the value of the coins increase? ** The value of his investment increases by 15*2/3=$<<15*2/3=10>>10 per coin
How much was each coin worth? ** So each coin was worth 15+10=$<<15+10=25>>25
How many coins did James sell? ** So he sold 300/25=<<300/25=12>>12 coins
#### 12