ajutor.............????

1) 1/3:9/6=1/3*6/9=2/9
2) 3/4:27/8=3/4*8/27=2/9
3) 8/5*12/250=48/625
4) 11/9+3/25:9/125=11/9+3/25*125/9=11/9+5/3=11/9+15/9=26/9