Answer:
7/10
Explanation:
Comparison of these three fractions is easier if you convert them so that all have the same denominator.
"Closer to 1/2 than to 1" implies that the fraction chosen lies between 1/2 and 3/4, that is, between 0.500 and 0.750.
7/8 = 0.875 must be rejected. It does not satisfy this criterion. 0.875 is NOT closer to 1/2 than it is to 1.
10/12 = 0.833 must be rejected for the same reason.
12/14 = 6/7 must be rejected for the same reason
7/10 = 0.700 satisfies the criterion (it lies closer to 1/2 than it does to 1).