Explanation:
If the denominator of the fraction has only 2s or 5s in its prime factorization, it is a terminating decimal.
Since 25 = 5², 11/25 is terminating.
Since 9 = 3², 4/9 is repeating.
Since 12 = 2² * 3, 5/12 is repeating.
Since 8 = 2³, 7/8 is terminating.