Question

2,(123)=
1,(54)=
5,(73)=
7,(5)=
0,1(6)=
31,21(3)=​

Answer 1

$2.(123) = \frac{2123 - 2}{999} = \frac{2121}{999} = \frac{707}{333}$

$1.(54) = \frac{154 - 1}{99} = \frac{153}{99} = \frac{51}{33} = \frac{17}{11}$

$5.(73) = \frac{573 - 5}{99} = \frac{568}{99}$

$7.(5) = \frac{75 - 7}{9} = \frac{68}{9}$

$0.1(6) = \frac{16 - 1}{90} = \frac{15}{90} = \frac{3}{18} = \frac{1}{6}$

$31.21(3) = \frac{31213 - 3121}{900} = \frac{28092}{900} = \frac{9364}{300} = \frac{2341}{75}$