What you do first is put them into improper fractions .what you do is you multiply the 10 and the 9=90 then you add the 90+8 = 98 over 10. The next you do 4 times 3=12 + 1=13 over 3. Then you have 98/10 minus 13/3. Next you need to get common denominators. For 98/10 you are going to multiply 3 both times for the top and bottom to get 294/30. Next for 13/3 you are going to multiply by 10 both time for the top and bottom to get 39/30. Next step you subtract 294-39=255/30. But then after that you have to simply 255/30. For a decimal you get 8.5 or you can also get 15/2 by dividing both top and bottom by 15. Or 7 and 1/2. Either the following answers are correct 8.5 or 15/2 or 7 and 1/2.