Okay, first off negative is well negative and since there is no other negatives, -5/7 is least (making it go first). Second, what is smaller 3/5 or 2/9, remember that the bigger the denominator the smaller the piece.
[/] [/] [/] [] [] = 3/5
[/] [/] [] [] [] [] [] [] [] 2/9
At the end it should be -5/7, 2/9 , 3/5. This method can go the same for problems like these...Hope it helps!
