Objective 
In this challenge, we practice calculating probability. 
Task 
In a single toss of  fair (evenly-weighted) -sided dice, find the probability of that their sum will be at most .
Output Format
In the editor below, submit your answer as Plain Text in the form of an irreducible fraction , where and are both integers.
Your answer should resemble something like:
3/4  
(This is NOT the answer, just a demonstration of the answer format.)