A, because the equation shows that G is opposite number for P.
4a^5b^2=2*2*a*a*a*a*a*b*b
ab=a*b
greatest factor is ab
The proportion would be the number of the sample (x) over the population size (n)
Here we have x = 59,969 and n= 461,299
P = x/n = 59969/461299
P = 0.13