trouver une fracion comprises entre 1 tiers et 1 demi

11/23 ≈ 0.478.........
10/21 ≈ 0.476......
9/19 ≈ 0.473.......
8/17 ≈ 0.47......
7/15 ≈ 0.46666666............7
6/13 ≈ 0.461......
5/11 = 0.45454545454..................
4/9 = 0.444444444444...................
3/7 ≈ 0.42
2/5 = 0.40
1/2 = 0.50