5 / 18 5 / 9 16 / 9 () 40 / 9

5 / 18 5 / 9 16 / 9 () 40 / 9

5/18 5/9 16/9 (x ) 40/9
Namely
5/18,10/18,52/18,y/18,80/18
5,10,52, y, 80 were investigated
5 = 5 * (2 ^ 0). The product of 1 prime number
10 = 5 * (2 ^ 1). The product of two prime numbers
52 = 13 * (2 ^ 2). The product of three prime numbers
y=...
80 = 5 * (2 ^ 4). The product of 5 prime numbers
According to the law, we know that y is a multiple of 2 ^ 3, and Y is the product of four prime numbers, and 52