### Instruction: by selling an article at rs . 500 , a profit of 25 % is made . find its cost price ? Let's write a Python program to solve it.### Response: n0 = 500.0
n1 = 25.0
t0 = n1 + 100.0
t1 = n0 * 100.0
answer = t1 / t0
print(answer)