How it's calculated?
Turnover Ratio = (Turnovers * 100) / (Field Goals Attempted + (Free Throws Attempted * 0.44) + Assists + Turnovers)

What does it mean?
Turnover Ratio is the percentage of a team's possessions that end in a turnover. Similar to how Assist Ratio is used, Turnover Ratio seeks to evaluate a team or player's decision making abilities.