Time Conversion Table - Minutes as Hourly Percentages

Due to the limitations of my billing system, I have created the following chart to covert billable time from mintues to percentages of an hour.

Conversely this chart can be used to convert hourly percnetages back into minutes

Minutes of Hour
(seconds rounded)		 Percentage of Hour
(to two digits)		 Permille of Hour
(to three digit)
01 min 0.02 0.016
02 min 0.03 0.033
03 min 0.05 0.050
04 min 0.07 0.066
05 min 0.08 0.083
06 min 0.10 0.100
07 min 0.12 0.116
08 min 0.13 0.133
09 min 0.15 0.150
10 min 0.17 0.166
11 min 0.18 0.183
12 min 0.20 0.200
13 min 0.22 0.216
14 min 0.23 0.233
15 min 0.25 0.250
16 min 0.27 0.266
17 min 0.28 0.283
18 min 0.30 0.300
19 min 0.32 0.316
20 min 0.33 0.333
21 min 0.35 0.350
22 min 0.37 0.366
23 min 0.38 0.383
24 min 0.40 0.400
25 min 0.42 0.416
26 min 0.43 0.433
27 min 0.45 0.450
28 min 0.47 0.466
29 min 0.48 0.483
30 min 0.50 0.500
31 min 0.52 0.516
32 min 0.53 0.533
33 min 0.55 0.550
34 min 0.57 0.566
35 min 0.58 0.583
36 min 0.60 0.600
37 min 0.62 0.616
38 min 0.63 0.633
39 min 0.65 0.650
40 min 0.67 0.666
41 min 0.68 0.683
42 min 0.70 0.700
43 min 0.72 0.716
44 min 0.73 0.733
45 min 0.75 0.750
46 min 0.77 0.766
47 min 0.78 0.783
48 min 0.80 0.800
49 min 0.82 0.816
50 min 0.83 0.833
51 min 0.85 0.850
52 min 0.87 0.866
53 min 0.88 0.883
54 min 0.90 0.900
55 min 0.92 0.916
56 min 0.93 0.933
57 min 0.95 0.950
58 min 0.97 0.966
59 min 0.98 0.983
60 min 1.00 1.000