[tex]\displaystyle\\
0,25 = \frac{25}{100}= \frac{1}{4} \\\\
1,2= \frac{12}{10}=\frac{6}{5}\\\\
4,(5)=\frac{45-4}{9}=\frac{41}{9}\\\\
0,(27)=\frac{27}{99}=\frac{3}{11}\\\\
1,4(5)=\frac{145-14}{90}=\frac{131}{90}\\\\
1,12(16) =\frac{11216-112}{9900}=\frac{11104}{9900}=\frac{2776}{2475}
[/tex]
