You can put this solution on YOUR website! Rewrite each fraction to use the lowest common denominator and you can arrange the results in order.
12 = 2*2*3
4 = 2*2
2 =2
9 =3*3
Lowest common denominator is 2*2*3*3.
Fill in the missing factors for each numerator and denominator to bring each fraction to higher terms.
Put them in order.