You can divide fractions and I'll show you how, I've long ago forgotten the reasons for my actions but trust me I know they're correct. Change them all into improper fractions first 4 and 5/6 would be 29/6, and 1 and 1/2 would be 3/2 then reverse the one that's dividing and multiply by it. By that I mean 3/2 becomes 2/3. Now we can multiply like this 29/6* 2/3 = 3.22222