Problem $21-7($Algo$)$

Required:

a$-1.$ With a $3\mathrm{.}0\%$ inflation rate $($Spreadsheet $21\mathrm{.}2),$ by how much would your retirement annuity grow if you increase the savings rate by $0\mathrm{.}8\%?($Round your percentage answer to $2$ decimal places.$)$