I don’t know how many sides the spinner is for your problem. But if a spinner has 6 possible results, then the number 2 is one of those 6 possibilities.
To find a probability, you divide the outcome by the total number of outcomes.
This results in 1/6. Which is 1.66666 repeating. As a percentage this becomes 16.67%.
P.S: if your spinner has more than six sides, simply divide 1 by whatever number of sides your spinner has.