Question

What 0.1315 with a bar over all numbers

Answer 1

`\overline{0.1315}=(1315)/(9999)`

Explanation:

The trick is that because there are 4 digits being repeated infinitely, then this is equivalent to 1315/9999 because of the four 9s.

Answer 2

Explanation:

0.1315 with a bar over all numbers means that the pattern of digits under the bar repeats without end. So the number is 0.1315131513151315131513151315....... etc

There is a formula to kind of simply this but I do not think that is what you are asking for.