Least to greatest:
Least: 8/9 ÷ 7/11 = 1 25/63
Second Least: 8/9 ÷ 3/10 = 2 26/27
Third Least: 1 7/12 ÷ 3/10 = 5 5/18
Greatest: 1 7/12 ÷ 1/15 = 23 3/4
The rule for dividing fractions
Keep, Change, Flip.
I'll give an example.
5/7 ÷ 11/12 =
First we keep the 5/7
Then we turn the division symbol to a multiplication sign.
Then we flip 11/12 to 12/11.
5/7 x 12/11 = 60/77.