Question

Cat face 2,1(3) ? E URGENT AJUTOR

Answer 1

2,1(3)=2 intregi (13-1)/90
         =2 intregi 12/90
         =(2x90+12)/90
         =192/90
         =32/15

Answer 2

 2,1(3) = (213-21)/90 = 192/90 = (simplificam cu 6) = 32/15