zero aka 0
If 0, half or 1 refers to inches, the answer is 0.
5/8 is closest to a half.
There is no possible answer. For any given fraction, half that fraction is another fraction and it will be closer to 0. And then half of that will be closer still, and then half of that ... . Hope you get the idea.
Of the three numbers given, two fifths is closest to zero.
Let's do the math: 1/5 = .20 0 = .00 1/2 = one half = .50 1/1 = one whole = 1.0 The distance between 1/5 and 0 is the shortest (only .20 away), and thus, 0 is the closest to 1/5.
the second one
It's closer to one half.
Put them in the freezer and wait until frost forms on one of them. That will be the one closest to 0º C.
4/7 as a decimal is 0.'571428' recurring
3/5 is closest to 1/2. Reasoning: 3/5 is equal to 0.6, which is closest to 0.5 (or 1/2) NOT 0, or 1.