Answer:
12 heads to 15 tails
Step-by-step explanation:
Heads : Tails
12 : 15
4 : 5
Answer:
5.178
Step-by-step explanation:
Cancel the 9 for an 8

What I would do is subtract 12 from -5. Then you would have -17. Then you would add 4 and it would be -13. So your answer is:
<h2><em>
-13</em></h2>