1. Make 4 1/4 and 4 1/2 into improper (17/4 divided by 9/2) then you would keep the 17/4 then change the division to multiplication (X) and now you would flip the 9/2 so 2/9. 17/4x2/9=34/36 and if you simplify you get 17/18.
2. 8 1/3 and 4 2/7 change into improper
25/3 divided by 28/7, do KCF (keep change flip) do 25/3 x 7/28 = 175/84 then simplify so 1 17/18