\(\therefore \,\,\frac{{{I_2}}}{{{I_1}}}\,\,\, = \,\,{\left( {\frac{{{r_1}}}{{{r_2}}}} \right)^2}\,\, = \,\,{\left( {\frac{{{r_1}}}{{{r_1}\,\, + \;\,2\% \,\,{r_1}}}} \right)^2}\)
\(\therefore \,\,{I_2}\,\, = \,\,{I_1}\,\,{\left( {\frac{{{r_1}}}{{{r_1}\,\,\left( {1.02} \right)}}} \right)^2}\,\, = \,\,{I_1}\,\,{\left( {1.02} \right)^{ - 2}}\,\, = \,\,I\,\,\left( {0.96} \right)\,\)
\(\, = \,\,{I_1}\,\,\,\left( {1\, - \,\,0.04} \right)\,\, = \,\,{I_1}\,\, - \,\,4\% \,\,{I_1}\)