You can put this solution on YOUR website! There are 36 different combinations that you can roll with a pair of dice (since 6*6=36). If you aren't convinced, you can make a table to diagram all of the possible outcomes.
Now let's list the pairs of numbers that are identical:
1,1
2,2
3,3
4,4
5,5
6,6
Since there are 6 choices, this means that the probability of rolling the same number on a pair of dice is