31/80+(3/16+39/80);2/45+(3/45+7/9)

Question

31/80+(3/16+39/80);2/45+(3/45+7/9)

Answer 1

31/80+(3/16+39/80)=31/80+(15/80+39/80)=31/80+54/80=85/80=1 5/80=1 1/16;

2/45+(3/45+7/9)=2/45+(3/45+35/45)=2/45+38/45=40/45=8/9