There are 36 combos for 2 6-sided dice: 6 possibilities for the first die times 6 for the second.
1. There is only one combo that does
not fit this, which is 6&6 since it is equal to 12.
That means 35 out of 36 work. 35/36
As a decimal it is 0.97

and as a percent it is 97.

%.
2. There are 6 combos in which the dice show the same value:
1&1, 2&2, 3&3, 4&4, 5&5, 6&6
That is 6/36, which is 1/6.
As a decimal it is 0.1

and as a percent it is 16.

%.
Hope this helps!