Tack Improvement Formulas
Description These are the official formulas for tack improvement, they work as an estimate only, and you may need to make more or less tack to get to the next percentage.

Manufacturers formula:

• (current_skill + 1) * (current_skill + 1)/(30+10)
• (current_skill + 1) * (current_skill + 1)/(45+10) - with a magic item used The tome of perfect or The scroll of tack improvement
Equilibriums formula:

• (current_skill + 1) * (current_skill + 1)/(20+3)
• (current_skill + 1) * (current_skill + 1)/(45+3) - with a magic item used The tome of perfect or The scroll of tack improvement

Links: Workshop extra's and formulas Tack Improvement Formulas 101-200

.	Manufacturer	.	Equilibrium	.
Current Skill	With Magic Item	Without Magic	With Magic Item	Without Magic
1	1	1	1	1
2	1	1	1	1
3	1	1	1	1
4	1	1	1	1
5	1	1	1	2
6	1	1	1	2
7	1	2	1	3
8	1	2	2	4
9	2	3	2	4
10	2	3	3	5
11	3	4	3	6
12	3	4	4	7
13	4	5	4	9
14	4	6	5	10
15	5	6	5	11
16	5	7	6	13
17	6	8	7	14
18	7	9	8	16
19	7	10	8	17
20	8	11	9	19
21	9	12	10	21
22	10	13	11	23
23	10	14	12	25
24	11	16	13	27
25	12	17	14	29
26	13	18	15	32
27	14	20	16	34
28	15	21	18	37
29	16	23	19	39
30	17	24	20	42
31	19	26	21	45
32	20	27	23	47
33	21	29	24	50
34	22	31	26	53
35	24	32	27	56
36	25	34	29	60
37	26	36	30	63
38	28	38	32	66
39	29	40	33	70
40	31	42	35	73
41	32	44	37	77
42	34	46	39	80
43	35	48	40	84
44	37	51	42	88
45	38	53	44	92
46	40	55	46	96
47	42	58	48	100
48	44	60	50	104
49	45	63	52	109
50	47	65	54	113
51	49	68	56	118
52	51	70	59	122
53	53	73	61	127
54	55	76	63	132
55	57	78	65	136
56	59	81	68	141
57	61	84	70	146
58	63	87	73	151
59	65	90	75	157
60	68	93	78	162
61	70	96	80	167
62	72	99	83	173
63	74	102	85	178
64	77	106	88	184
65	79	109	91	189
66	82	112	94	195
67	84	116	96	201
68	87	119	99	207
69	89	123	102	213
70	92	126	105	219
71	94	130	108	225
72	97	133	111	232
73	100	137	114	238
74	102	141	117	245
75	105	144	120	251
76	108	148	124	258
77	111	152	127	265
78	113	156	130	271
79	116	160	133	278
80	119	164	137	285
81	122	168	140	292
82	125	172	144	300
83	128	176	147	307
84	131	181	151	314
85	134	185	154	322
86	138	189	158	329
87	141	194	161	337
88	144	198	165	344
89	147	203	169	352
90	151	207	173	360
91	154	212	176	368
92	157	216	180	376
93	161	221	184	384
94	164	226	188	392
95	168	230	192	401
96	171	235	196	409
97	175	240	200	418
98	178	245	204	426
99	182	250	208	435
100	185	255	213	444