One way to order a group of fractions is to write them down as decimals, which makes them easier to compare.
1/3 = 0.3333...
2/7 = 0.285714...
3/14 = 0.214285714...
1/6 = 0.16666...
So we compare the decimals and see that
0.1666... < 0.21428... < 0.2857.... < 0.3333, which tells us that
1/6 < 3/14 < 2/7 < 1/3.
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