The prime numbers between 12 and 15 are 13.
A prime number is defined as a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. In this range, 13 is the only number that meets this criterion, as both 12 and 14 are divisible by numbers other than 1 and themselves (12 is divisible by 1, 2, 3, 4, 6, and 12; 14 is divisible by 1, 2, 7, and 14).
Now, to find the fraction of the prime number we identified, we take the prime number 13 and express it as a fraction of the entire set of numbers from 12 to 15. The numbers in this range are 12, 13, 14, and 15, which gives us a total of 4 numbers.
Therefore, we can express the fraction of prime numbers as: Prime Numbers / Total Numbers = 1 / 4.
This indicates that within the range from 12 to 15, only 25% of the numbers are prime.