keeping in mind that we can convert any value in percent format to a percent fraction by simply dividing it by 100, this one is 17.5, so let's first convert that 17.5 to a fraction, namely an improper fraction in this case, we have one decimal, .5, so we'll divide it by 10, and then we'll do the percent fraction conversion.
![\bf 17.5\%\implies \cfrac{175}{10}\% \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{percent format}}{\cfrac{175}{10}\%}\implies \cfrac{~~(175)/(10)~~}{100}\implies \cfrac{~~(175)/(10)~~}{(100)/(1)}\implies \cfrac{175}{10}\cdot \cfrac{1}{100}\implies \cfrac{175}{1000} \\\\\\ \implies \cfrac{~~\begin{matrix} 5\cdot 5 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~\cdot 7}{2\cdot 2\cdot 2\cdot ~~\begin{matrix} 5\cdot 5 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~\cdot 5}\implies \cfrac{7}{40}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/n4tt0lt2cb8ozgdbhx42c6ig1ajg3d17d3.png)