SM$\mathrm{.}63$ A small company has $$4,250,000$ in $($annual$)$ revenue, spends $56\%$ of its revenues on purchases, and has a net profit margin of $11\mathrm{.}25\%.$ They would like to increase their profits and they are looking at focusing in one of two directions. First, they think they can save $1\mathrm{.}85\%$ on their purchase expenses. Or second, they can focus on increasing sales. By what percentage would they have to increase sales in order to equal a $1\mathrm{.}85\%$ savings to purchasing expenses? $($Write your answer as a percentage, and display your answer to two decimal places.$)\%$