3/4 would be f because you need to turn it into a common denominator which is 8. 4×2=8 which would be the denominator. Whatever you do to the bottom you do to the top. You would have to do 3×2=6 then it would be 6/8 which is f. for 1/4 you would still need a common denominator of 8 so you would do 4×2=8 and 1×2=2 then you would get 2/8 which you would get b. 1/4 is b and 3/4 is f.
