15 one-hundred and thirtieths (15/130)
==================================
Another contributor simplified:
(8/13) - (1/2) = (16/26) - (13/26) = 3/26
8/13 - 3/13 = 5/13
1/2 minus 1/8 is 3/8
5/8 minus 1/2 is 1/8.
It is: 1/2 minus 3/8 is the same as 4/8 minus 3/8 = 1/8
1/8
5/8
8 and a half
It is: 1.5 -5/8 = 7/8
2 and one half
1/4
91/8
100/8 - 105/8 = -5/8