A vertical shaft Francis turbine rotates at $\text{300 rpm}$. The available head at the inlet to the turbine is $\text{200 m}$. The tip speed of the rotor is $\text{40 m/s}$. Water leaves the runner of the turbine without whirl. Velocity at the exit of the draft tube is $\text{3.5 m/s}$. The head losses in different components of the turbine are: $\text{(i)}$ stator and guide vanes: $\text{5.0 m}$, $\text{(ii)}$ rotor: $\text{10 m}$, and $\text{(iii)}$ draft tube: $\text{2 m}$. Flow rate through the turbine is $20 \text{ m$^{2}$/s}$. Take $g=9.8 \text{ m/s}^{2}$. The hydraulic efficiency of the turbine is ______ $\% (\textit{round off to one decimal place}$).