7 1/2 divided by 1 9/10. We are doing the keep, change, flip method so it will look like 2 times 7 is 14 plus 1 is 15 so you would have 15/2 but if on the next one is 10 times 1 is 10 then plus 9 is 10/19 I don't know how to do it because if you cross simplify 2 and 10 it would change to 15/1 x 5/10 but 10 cannot go into 15 so if you do 15 x 5 it's 75 so I'm not sure if you get 10 for the bottom because of 10 x 1 = 10 and then you get 75/10 then divide it and you'll get 10 divided by 75 = 7 and 5/10 is that correct? I am not sure.