(3/9+1/3)÷5/12=2/3x12/5=8/5
(3/9 +1/3) / (5/12)=2/3 / (5/12)=8/5
1.6
(3/9+1/3)÷5/12=2/3÷5/12=8/5
(3/9+1/3)÷5/12=(1/3+1/3)÷5/12=2/3×12/5=8/5
