M = (-1,1)

C=0

for a in range(1,10):

    for b in range(1,10):

        for c in range(10,100):

            if a * (100 * b + c) == b * (10 * c + a) and M[0] * b < M[1] * a:

                M = (a,b)

                C=c


print(f"{M[0]}/{M[1]},{C}")


> 5/1,99