Well, darling, the range of those numbers is simply the difference between the highest and lowest values. So, in this case, the range would be 179 (highest) minus 109 (lowest), which equals 70. Voilà, that's your range, sweetie.
150/109 = .726666667 = 72.6%
117 / 0.78 = 150
0.78
102, 108, 114, 120, 126, 132, 138, 144, and 150
As 150 is the lowest and 900 is the highest, the range is 750.