When I run the code it gives me a runtime error. Why? Python3 for problem 1011.

from math import ceil, floor

a = float(input())
b = float(input())

if a>b:
    a, b = b, a

num = 1
while ceil((a/100)*num) != floor((b/100)*num):
    num += 1

print(num)

Edited by author 06.05.2016 11:07