What is the $\%$ relative error in the calculation:

$(10\mathrm{.}83+-0\mathrm{.}84)-(2\mathrm{.}38+-0\mathrm{.}82)$

the answer is $0\mathrm{.}58$ with a margin of error $+/-2\%.$ I$\text{'}$m not exactly sure how to get that answer