it takes a delta to form 100 years or more
It is 2400/850 = 48/17.
They are number of the form 850*k where k is any integer.
850 = (8 x 100) + (5 x 10) + (0 x 1)
0.0824
8/50 = 4/25
0.9444
850
850
85/100 or 17/20 inches.
850/1500 is 17 to 30 in its simplest form
28.5% of 850 = 28.5% * 850 = 0.285 * 850 = 242.25