Answer
a)21.4%
b)85.7%
c)The labels described as ratio are much better.
Work Step by Step
a) We know that $probability=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes}$, hence probability=$\frac{3}{11+3}=0.214=21.4$%.
b) We know that $probability=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes}$, hence probability=$\frac{12}{12+2}=0.857=85.7$%.
c) By seeing the earlier results, the labels described as ratio are much better.