Final answer:
Sandy Koufax's win/loss percentage is 0.056 higher than Walter Johnson's, obtained by subtracting Johnson's percentage (0.599) from Koufax's percentage (0.655).
Step-by-step explanation:
To calculate how much higher Sandy Koufax's win/loss percentage is compared to Walter Johnson's, you subtract Johnson's percentage from Koufax's. Using the given win/loss percentages:
- Sandy Koufax's win/loss percentage: 0.655
- Walter Johnson's win/loss percentage: 0.599
Subtracting Johnson's from Koufax's gives us:
0.655 - 0.599 = 0.056
Therefore, Sandy Koufax's win/loss percentage is 0.056 higher than Walter Johnson's, which corresponds to option (a).