How do you convert 0.51 repeating as a fraction

Here are the following factors for 51 and 100:

51 = 1, 3, 17, 51

100=1, 2, 4, 5, 10, 20, 25, 50, 100

Since none of the numbers that go into 51 go into 100

(1 doesn't count) 51/100 is the correct answer, and cannot be put into lower terms.