To get to her grandmother's house, Wisdom walked one-fifth of the distance and took a bus the rest of the way. How many times the distance travelled by bus is the total distance?
1 1/5 [OP_SUB]
var_a = 1
var_b = 0.2
var_c = var_a - var_b
print('{:.2f}'.format(round(var_c+1e-10,2)))