From the problem we construct the equation that will tells us the number of ounces of raisins, that is:
[tex]8(r+1.25)=18.8[/tex]So, the amount of ounces of raisins is:
[tex]r+1.25=2.35\Rightarrow r=0.5[/tex]So, there will be 0.5 ounces of raisins per bag.