1/5, 2/7, 1/3, 2/4, 5/8, 4/6
There are a bunch of ways to do it. One way is to convert everything to decimal, then put it in order:
1/3 = 0.3333 (roughly)
2/4 = 0.5000
2/7 = 0.2857 (roughly)
4/6 = 0.6666 (roughly)
5/8 = 0.6250
1/5 = 0.2000
The decimals, in order would look like this:
0.2000, 0.2857, 0.3333, 0.5000, 0.6250, 0.6666
The fractions corresponding to those decimals would look like this:
1/5, 2/7, 1/3, 2/4, 5/8, 4/6