Answer: 1:3
Explanation:
Given : The number of games played by the player = 20
Winning percentage = 25% =0.25
Then , the number of games he won =

We assume that there cannot be a draw in the game.
Then , the number of games he had lost =

Now, the ratio of the number of games he won to the number of the games he lost is given by :-

Hence, the ratio of the number of games he won to the number of the games he lost = 1:3