When you divide 15/14 by a particular number, you get 9/14. Find that particular number. 
15/14 9/14 [OP_DIV]
var_a = 1.0714285714285714
var_b = 0.6428571428571429
var_c = var_a / var_b
print('{:.2f}'.format(round(var_c+1e-10,2)))