Irrigation Water Conveyance and Application Methods

In a field evaluation test of a drip irrigation system with 25 test emitters, the average discharge of the lowest one-quarter (lowest $25\%$) of emitters is $q_{25} = 3.6\text{ L/h}$ and the mean discharge of all sampled emitters is $\bar{q} = 4.0\text{ L/h}$. The design Emission Uniformity ($EU = \frac{q_{25}}{\bar{q}} \times 100$) in percentage is ________ (answer in integer).