Which of these fractions is a terminating decimal?

Question

Quizplus · Accepted Answer

A terminating decimal is a decimal number that ends after a finite number of digits. To determine whether a fraction has a terminating decimal or not, we need to simplify the fraction to its lowest terms and then check if the denominator has only 2's and 5's as prime factors. 
For option A, simplifying the fraction gives 487/900 which cannot be simplified any further. However, the denominator has a prime factor of 3, so it is not a terminating decimal. The same holds for options B and D as their denominators have prime factors other than 2's and 5's. 
For option C, simplifying the fraction gives 903/2250 which reduces to 4/10 or 0.4, which is a terminating decimal.

Which of These Fractions Is a Terminating Decimal