百分比计算不起作用

1 python calculator percentage

mark=input("Please enter the mark you received for the test:")
total=input("Please enter the mark the test was out of:")

percentage=(mark*100/total)

print("Your percentage is:"),percentage,"%"
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当我在python 3.3.2 mac中运行它时会出现此错误.

Traceback (most recent call last):
  File "/Users/user1/Desktop/Percentage2.py", line 4, in <module>
    percentage=(mark/total*100)
TypeError: unsupported operand type(s) for /: 'str' and 'str'
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我该如何解决?

Bri*_*ius 6

percentage=(float(mark)*100/float(total))

print("Your percentage is: ",percentage,"%", sep='')
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