LCD means lowest (or least) common denominator, and that implies there must be at least two fractions involved for something to be common to both of them. There is, therefore, no sensible answer to this question.
13.1667
If that's 5/13 divided by 2/412, the answer is 1030/13 or 79 and 3/13 If that's 5/13 divided by 2 and 4/12, the answer is 15/91
79
79
0.3911
13% of 79= 13% * 79= 0.13 * 79= 10.27
2.4688
0.0001
There IS only one LCD. The word least is a superlative, which means there can be only one. LCD(79, 90) = 7110
79
79
79