What is the common denominator for five eights, one third and one half

Simple, just write the lists of multiples in the numbers

5/8

1/3

1/2

2:2,4,6,8,10,12,14,16,18,20,22,24

3:3,6,9,12,15,18,21,24

8:8,16,24

Thus, the common denominator would be 24.

5/8*3=15/24

1/3*8=8/24

1/2*12=12/24

These are your fractions.