def fractional_part(numerator, denominator):

 def fractional_part(numerator, denominator):

    if numerator > 0 and denominator > 0:

        return (numerator%denominator)/denominator

    else:

        return 0

print(fractional_part(5, 5)) # Should be 0

print(fractional_part(5, 4)) # Should be 0.25

print(fractional_part(5, 3)) # Should be 0.66...

print(fractional_part(5, 2)) # Should be 0.5

print(fractional_part(5, 0)) # Should be 0

print(fractional_part(0, 5)) # Should be 0