If you subtract 9 from both the numerator and denominator,

Sum of numerator and denominator =86-9*2=68.

And now the score is = 8/9 =16/18 = 24/27 = 32/36.

So after subtracting 9 from the numerator and denominator, the score is 32/36.

That is, the original score =(32+9)/(36+9)=4 1/45.