The Fraction that is between 0 and 1/2 is 2/10
The fraction 1/2 can also be written as 5/10. If you were to make a number line, you would be able to see that 2/10 is between. Here, let me order them from least to greatest:
< - 0 - - 2/10- - - 1/2- - 7/10- 3/4 - 8/10 - >
As you can see, 2/10 is between 0 and 1/2 (5/10).