The answer is 1/4
If you'd like an explantation, I will add it.
Hope this helped =D
(I added how many 1/8 there were and how many 1/4 there were)
3/4 - 4/8
Simplify 4/8, which gives you 1/2
Then find the LCD (Least common denominator which is 4
then subtract
(I cant add a picture of how i did because my camera is blurry on my computer