This one is the flop problem. you flop the last number when doing division. then it turns into multiplication
So for this it would be 9/8x5/4 so 9x5=45 and 8x4= 32 so your final answer is 45/32
If you wanted to make this into a mixed number, find out how many times 32 goes into 45. It goes in once so do 45-32=3 so basically your mixed number, simplified version is
1 3/32 and thats as far as you can get it.
Sorry, I know this answer was shown above, but the reason people go on this site is so they can get explanation, not cold hard calculator facts