Respuesta :

most likely it will be 19 out of 21 games if it is wrong sorry. 
pegah
you can say they won 12/14 games which is equal to 6/7 games so if you want to know how many games will they win if they play 21 games, you can just multiply: 
6/7 * 21 = 18 so the answer is 18 :)))
i hope this is helpful 
have a nice day