1/6 is left. First you need to have a common denominator and that is 36. So you should have 27/36 and 8/36 you can divide the 8 and 36 by 4 to reduce them and that’ll give you 27/9 and 2/36 then you can reduce 27 and 36 by dividing them by 9. You should have 3/9 and 2/4 now you can reduce them individually. 1/2 and 1/3 is what you should have. Then make 6 the common denominator and that’ll be 3/6 and 2/6 subtract that and you’ll get 1/6. That’s how much is left. Hope this helps