Is there an operator to calculate percentage in Python?

Question

I've recently learned that the " % " sign is used to calculate the remainder of an integer in Python. However I was unable to determine if there's another operator or method to calculate percent in Python.

Like with " / " which will give you the quotient, if you just use a float for one of the integers, it will actually give you the answer like traditional division. So is there a method to work out percentage?

Answer 1

You could just divide your two numbers and multiply by 100. Note that this will throw an error if "whole" is 0, as asking what percentage of 0 a number is does not make sense:

def percentage(part, whole):   return 100 * float(part)/float(whole) 

Or with a % at the end:

 def percentage(part, whole):   Percentage = 100 * float(part)/float(whole)   return str(Percentage) + “%” 

Or if the question you wanted it to answer was "what is 5% of 20", rather than "what percentage is 5 of 20" (a different interpretation of the question inspired by Carl Smith's answer), you would write:

def percentage(percent, whole):   return (percent * whole) / 100.0 

Answer 2

There is no such operator in Python, but it is trivial to implement on your own. In practice in computing, percentages are not nearly as useful as a modulo, so no language that I can think of implements one.