Answer:
1/4
Explanation:
We are given 0, 1/4, and 1/2
0 doesn't matter in this case since the value is nothing so lets just focus on 1/4 and 1/2, 1/2 can be represented as 2/4, so if we add all our values together:
1/4 + 2/4
3/4
We are asked to make one, therefore 1/4 is all that is needed to complete making one.