Answer :

AL2006
-- He played  20  games.
-- He won  2  of them.
-- He must have lost  (20 - 2)  =  18 games.

The ratio of (games lost) to (games won) is  18 to 2, or  9 to 1 .

He ought to consider taking up a different game, other than chees.
bookwormrds
He played 20 and won 2, this means that he lost 18. The way to write a ratio is this (firsts answer:second answer). So your answer is 18:2