LCM is 5*3*8=120. Now apply for he fractions to 120: 24, 80, 75.
This means we can write the fractions: 24/120, 80/120, 75/120.
120th is common so we need only look at the numerators and put them in order: 24, 75, 80.
So the order of the fractions is 24/120, 75/120, 80/120 which are 1/5, 5/8, 2/3.