Respuesta :

[tex]\bf 0.\underline{225}\implies \cfrac{0255}{1\underline{000}}\impliedby \textit{notice, \underline{3 decimals}, thus \underline{3 zeros} and no \underline{dot}} \\\\\\ \cfrac{\frac{255}{5}}{\frac{1000}{5}}\implies \boxed{\cfrac{51}{200}}[/tex]