An ESP treats the flue gas with a viscosity of $0\mathrm{.}032$t mpa$-$S from a coal combustion unit and achieves a $97\%$ PM removal efficiency Suddenly. The efficiency drops to $92\%$ due to a change in the particle change on the incoming PM$.$ The incoming particle diameter and electric field were found to be constant with a value of $1$ pm and $1,00,000$ V$/$m$,$ respectively. Assume that the particles are large enough and Stoke's law is perfectly applicable without any correction. Determine the percent change in particle Charge.