45*m - n --------*c 23*c ---------- n - 45*m
n 45*m - -- + ---- 23 23 ----------- n - 45*m
0.0434782608695652*(-n + 45.0*m)/(n - 45.0*m)
-n + 45*m -------------- -1035*m + 23*n
-1/23