it is 91
It is: 17.2*5 = 86
12.285714 x 7 = 86
86 times 2 equals 172.
21.5 x 4 = 86
25 times what equals 500 = 12500
As a product of its prime factors: 2*43 = 86
11 11 times 25 equals 275
It equals 625.
25 times 40 equals 100.
423 divided by 86 equals 4 with a remainder of 79.
5/43 divided by 25/86 is the same as 5/43 times 86/25. So that's (5 X 86)/(43 X 25) = 430/1,075