Rather ODD question

Hi folks, Good evening
 
Can i ask something about odds and chances of winning please?
 
If i have:
Greyhound / Horse race on "winning markets" @ lay price 2 odds
 
When i lay bet I see the liabilities and winning amounts as:
-9.50 liable (on the fav)
10+ win on all other placements
 
What is the percentage of "winning" the lay for races with?
 
6 runners – lay betting on 1 placement
7 runners – lay betting on 1 placement
9 runners – lay betting on 1 placement
10 runners – lay betting on 1 placement
14 runners – lay betting on 1 placement
 
... and can you show how to calculate that please ~ thank you
 
 

Im looking for % values please

Im thinking of using that value (A) with % of bank (B) as recouping loss

Ahh see... its not about how many runners there are in a market, the odds being offered are a suggested reflection of the chance of winning. To do with form, if one is winning over the other closer to the end line etc. As in its a dynamic and changing. Sorry DUH! lol

Ill leave what I found out here for others:

odds 1.53      = 1/1.53 = 0.65 => 65% chance of winning
odds 2         = 1/2 = 0.50 => 50% chance of winning
odds 3.70      = 1/3.70 = 0.27 => 27% chance of winning

Decimal	Probability %
1.01	99.00
1.02	98.03
1.03	97.08
1.04	96.15
1.05	95.23
1.10	90.90
1.15	86.95
1.18	84.74
1.20	83.33
1.23	81.30
1.25	80.00
1.29	77.80
1.30	76.70
1.33	75.00
1.36	73.33
1.40	71.43
1.44	69.23
1.50	66.67
1.53	65.50
1.57	63.64
1.65	61.90
1.67	60.00
1.73	57.89
1.80	55.56
1.83	54.55
1.90	52.63
1.91	52.38
2.00	50.00
2.05	48.78
2.10	47.62
2.11	47.37
2.20	45.45
2.25	44.44
2.30	43.48
2.35	42.55
2.37	42.11
2.40	41.67
2.50	40.00
2.60	38.46
2.62	38.10
2.70	37.04
2.75	36.36
2.80	35.71
2.87	34.78
2.90	34.48
3.00	33.33
3.10	32.26
3.20	31.25
3.25	30.77
3.30	30.30
3.40	29.41
3.50	28.57
3.60	27.78
3.70	27.03
3.75	26.67
3.80	26.32
4.00	25.00
4.33	23.08
4.50	22.22
5.00	20.00
5.50	18.18
6.00	16.67
6.50	15.38
7.00	14.29
7.50	13.33
8.00	12.50
8.50	11.76
9.00	11.11
9.50	10.53
10.00	10.00
11.00	9.09
12.00	8.33
13.00	7.69
15.00	6.67
17.00	5.88
19.00	5.26
21.00	4.76
23.00	4.35
26.00	3.85
29.00	3.45
34.00	2.94
41.00	2.44
51.00	1.96
67.00	1.49
81.00	1.23
101.00	0.99