Runtime Error(NZEC) in python 3

help
1

THIS IS MY FIRST CODE AND AGIN AND AGIN I AM GETTING THIS ERROR EVEN THOUGH OUTPUT IS CORRECT
x=int(input())
y=float(input())
charges=0.50
if x%5==0:
amount=y-(x+charges)
print(’%.2f’%amount)
else:
print(’%.2f’%y)

2

can you post the question