[tex]\displaystyle -0,72=- \frac{72}{100} ^{(4} =- \frac{18}{25} \\ \\ 5,36= \frac{536}{100} ^{(4} = \frac{134}{25} \\ \\ -0,(42)=- \frac{42}{99} ^{(3} =- \frac{14}{33} \\ \\ -3,(18)=- \frac{318-3}{99} =- \frac{315}{99} ^{(9} =- \frac{35}{11} \\ \\ 0,5(3)= \frac{53-5}{90} = \frac{48}{90} ^{(6} = \frac{8}{15} \\ \\ 12,3(45)= \frac{12345-123}{990} = \frac{12222}{990} ^{(18} = \frac{679}{55} [/tex]
[tex]\displaystyle -7,6(543)=- \frac{76543-76}{9990} =- \frac{76467}{9990} ^{(3} =- \frac{25489}{3330} [/tex]
