Brain Teasers
Winning Record
Chanelle has won 429 games and lost 431 games of her favorite computer card game.
If she wins 3 out of every 4 games she plays from now on, how many more games must she play to bring her total winning percentage up to 55%?
If she wins 3 out of every 4 games she plays from now on, how many more games must she play to bring her total winning percentage up to 55%?
Hint
Guess and check and keep track of the number of games won, games lost, and total games played. Better still, use a variable to represent the number of extra games Chanelle must play.Answer
Chanelle must play 220 more games. In these 220 games she wins 3 out of every 4 games, bringing her total of games won to 594 out of 1,080 played (or, 55%).Hide Hint Show Hint Hide Answer Show Answer
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