Answer: 10/11, or 0.9090 (repeating)
Explanation:
A ratio normally would be written as 10:11 as you are comparing lacrosse players to soccer players.
To write this as a fraction you put the first number in the ration as the numerator and the second number as the denominator, 10/11.
To write as a decimal you solve the fraction. To solve the fraction you just divide 10 by 11 which in 0.9090, repeating.
0.9090 is the decimal version of this ratio and is a repeating decimal because the numbers keep going on as 9090 instead of ending.