-27
12 + 15 + 63 + 12 + 24 + 34 + 23 + 15 = 198
15 + 12 + 17 = 44
1+12=13+15=28+2=30+29=59.
12.
162
12 + 15 + 63 + 12 + 24 + 34 + 23 + 15 = 198
15 +26+9+12
15 + 12 + 17 = 44
3 + 11 + 11 + 11 + 12 + 13 + 15 + 15 + 16 + 17 + 19 = 143
1+12=13+15=28+2=30+29=59.
12 + 15% = 12.1512% + 15% = 27%13.8 is 15% greater than 12.
20
-12 + 6 - 10 - 6 +15 = -7
12.
12.
162
It is: (15+18)+12 = 45