Seojun did 1/3 of the homework yesterday and 2/5 of the total today. Find the total amount of homework remaining.
1 1/3 [OP_SUB] 2/5 [OP_SUB]
var_a = 1
var_b = 0.3333333333333333
var_c = var_a - var_b
var_d = 0.4
var_e = var_c - var_d
print('{:.2f}'.format(round(var_e+1e-10,2)))