The dimensions of a soil sampler are given in the table.
$$\begin{array}{|c|c|c|} \hline \text{Parameter} & \text{Cutting edge} & \text{Sampling tube} \\ \hline \text{Inside diameter (mm)} & 80 & 86 \\ \hline \text{Outside diameter (mm)} & 100 & 90 \\ \hline \end{array}$$
For this sampler, the outside clearance ratio (in percent, round off to $2$ decimal places) is ______________