14 is correct (B). Hope it helps
The GCF of 2 and 4 is 2, so, divide both numbers in the ratio to find the simplified version.
2 to 4
2/2 to 4/2
1 to 2
Therefore, the answer is 1 to 2.
Best of Luck!
You would add 12+15 then subtract it from 32 to get your missing varible