The value of which one of the following fractions falls in between 3/5 and 7/8?

3/5 = 0.6 and 7/8 = 0.875. 6/7 ≈ 0.857 lies between them; 8/9 ≈ 0.889 and 12/13 ≈ 0.923 are too large and 4/7 ≈ 0.571 is too small.