Additional Algo $3-9$ Utilization

Harnesses are the flow unit in a process with two sequential resources. The capacities of the resources are $4\mathrm{.}2$ and $2\mathrm{.}9$ harnesses per second. Demand occurs at the rate $3\mathrm{.}8$ harnesses per second.

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

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