Customers are served in a process with two sequential resources. The processing times for the resources are $8\mathrm{.}1$ and $5\mathrm{.}5$ minutes, respectively. The first resource has $1$ worker and the second resource has $1$ worker. Demand occurs at the rate $4\mathrm{.}7$ customers per hour.

What is the utilization $(\%)$ of the second resource?

Note: Round your answer to $1$ decimal place.