Final answer:
5% of the league's soccer teams move on to the play-offs.
Step-by-step explanation:
To find the percentage of the league's soccer teams that move on to the play-offs, we need to divide the number of teams that make it to the play-offs by the total number of teams in the league and then multiply by 100 to convert it to a percentage.
Number of teams in the play-offs: 16
Total number of teams in the league: 320
Percentage of teams that move on to the play-offs: (16/320)*100 = 5%
Therefore, 5% of the league's soccer teams move on to the play-offs.