nothing
107
-31
-31
31
7, 31
the first five multiples are 31, 62, 93, , 124, and 155
1 + 10 + 20 = 31
30 - 6 i root(31), and 30 + 6 i root(31)
Multiples of 5 are not prime numbers except 5, so there are none. But, there are prime numbers between 20 and 40, like 23, 29, 31 and 37.
As a ratio it would be 20:1
20% of 31= 20% * 31= 0.2 * 31= 6.2