[tex]1,(63)=\frac{163-1}{99}=\frac{162}{99}=\frac{18}{11}.[/tex]
[tex](\frac{3}{11})^2=\frac{9}{121}.[/tex]
[tex]20,4=\frac{204}{10}=\frac{102}{5}.[/tex]
[tex]\frac{18}{11}:\frac{9}{121}-\frac{102}{5}=\\ \\ \frac{18}{11}*\frac{121}{9}-\frac{102}{5}=\\ \\ 22-\frac{102}{5}=\frac{110-102}{5}=\frac{8}{5}=1,6.[/tex]
@robertinnifd
