Subtraction of Fractions

Problem	Minuend	Subtrahend	Difference
1	7/15	3/10	1/6
2	1/18	1/16	-1/144
3	5/21	7/15	-8/35
4	1/18	1/10	-2/45
5	5/14	1/14	2/7
6	6/7	1/7	5/7
7	1/16	7/15	-97/240
8	7/10	5/16	31/80
9	7/10	1/24	79/120
10	6/7	8/9	-2/63
11	1/14	5/24	-23/168
12	6/7	2/7	4/7
13	7/12	1/12	1/2
14	7/20	7/12	-7/30
15	3/16	8/21	-65/336
16	7/8	6/7	1/56
17	1/21	1/14	-1/42
18	1/12	7/12	-1/2
19	2/7	3/16	11/112
20	1/3	11/12	-7/12
21	2/15	8/15	-2/5
22	1/24	1/10	-7/120
23	3/20	5/14	-29/140
24	3/14	5/18	-4/63
25	5/12	7/10	-17/60
26	7/24	2/21	11/56
27	6/7	1/15	83/105
28	3/10	7/16	-11/80
29	7/24	7/24	0
30	7/10	5/12	17/60
31	7/22	5/21	37/462
32	4/21	7/18	-25/126
33	3/4	5/4	-1/2
34	7/24	1/10	23/120
35	7/9	7/18	7/18
36	7/24	3/22	41/264
37	5/18	7/24	-1/72
38	6/7	11/15	13/105
39	7/16	5/18	23/144
40	7/16	5/14	9/112
41	5/18	4/15	1/90
42	7/24	4/21	17/168
43	3/14	7/22	-8/77
44	1/15	1/14	-1/210
45	7/16	1/16	3/8
46	3/16	7/18	-29/144
47	7/24	7/18	-7/72
48	7/24	5/24	1/12
49	7/18	3/14	11/63
50	8/9	7/24	43/72