a)25/9:2,(7)= =25/9 : 25/9= 1
2,(7)=(27-2)/9=25/9
b)6,38:19/100= 638/100 x 100/19= 638/19
c)3,(63):1,(27)= 40/11 : 14/11= 40/11 x 11/14=40/14=20/7
3,(63)=(363-3)/99=360/99=40/11
1,(27)=(127-1)/99=126/99=14/11
d)4/75:0,3(7)= 4/75 :34/90 =4/75 x 90/34= 2/5 x 6/17=12/85
0,3(7)=(37-3)/90 =34/90
e)0,(571419)=571419/999999=63491/111111
