A vibrating screen separates a feed mixture of $100\text{ kg/h}$ containing $40\%$ desired oversize material. The overflow product rate is $35\text{ kg/h}$ with $90\%$ oversize purity, and the underflow product rate is $65\text{ kg/h}$ containing $13.08\%$ oversize. The screen effectiveness based on oversize recovery ($\frac{\text{oversize in overflow}}{\text{oversize in feed}}$) in percentage is ________ (round off to 1 decimal place).