The density \( \rho \) of a uniform cylinder is determined by measuring its mass \( m \), length \( l \) and diameter \( d \). The measured values of \( m \), \( l \) and \( d \) are \( 97.42\pm0.02 \, \text{g} \), \( 8.35\pm0.05 \, \text{mm} \) and \( 20.20\pm0.02 \, \text{mm} \), respectively. Calculated percentage fractional error in \( \rho \) is ______.
