The answer is, if you follow the PEMDAS order of operations, 55 / 6, or 9.17, or 9.1666... and so on and so forth.
2115
1, 127
It is a prime number; it can be divided by 1 and 127.
12.7
127
127
127
127
127 is a prime number, meaning is can be evenly divided by 1 and itself only.
18.1429
15% of 2115 = 2115*15/100 = 317.25
127