1) 7 3/4
3/4 = 0.75
7.75 is your answer
2) 11 5/6
5/6 = 0.83 (rounded)
11.83 is your answer
3) 12 3/10
3/10 = 0.3
12.3 is your answer
4) 8 5/18
5/18 = 0.28 (rounded)
3.28 is your answer
5) 9 2/9 = 83/9 = 9.22
2/9 = 0.22 + 9 = 9.22 (Yes)
6)21 5/8 = 173/8 = 21.625
5/8 = 0.625 + 21 = 21.625 (Yes)
hope this helps