Question

A chees player played 20 games total . If he won 2 of games, what is the ratio of games he lost to games he won ?

Answer 1

-- 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.

Answer 2

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