Percents are based on the total player in the leaderboard.
1 -> 10
10 -> 100
100 -> 30%
30% -> 60%
For each medal, there is 3 colors depending on your ranking position. Percents here are based on the number of player with the same medal. For example if your are 23 / 9999 players, you will have the second medal with the blue color.