\[\boxed{\text{6.413.}}\]
\[\frac{1}{2} = 0,5 = 50\%;\ \]
\[\frac{1}{8} = 0,125 = 12,5\%;\ \]
\[\frac{5}{8} = 0,625 = 62,5\%;\ \]
\[\frac{3}{5} = 0,6 = 60\%;\ \]
\[\frac{17}{20} = 0,85 = 85\%.\ \]