What I do is that I change the denominator so that it is the same first. [1/4=9/36] [5/6=30/36] [5/9=20/36] Because all of these numbers can be multiplied into 36, I use 36. 4x9=36 6x6=36 9x4=36 So: From least to greatest: 9/36 (1/4) 20/36 (5/9) 30/36 (5/6) Hope this helped!