how to calculate percentage in python

Question

This is my program  print  Welcome to NLC Boys Hr  Sec  School   a input   nEnter the Tamil marks     b input   nEnter the English marks     c input   nEnter the Maths marks     d input   nEnter the Science marks     e input   nEnter the Social science marks     tota a b c d e print Total is     tota per float tota   100 500  print  Percentage is    per   Result  Welcome to NLC Boys Hr  Sec  School   Enter the Tamil marks  78  Enter the English marks  98  Enter the Maths marks  56  Enter the Science marks  65  Enter the Social science marks  78 Total is   375 Percentage is   0 0   However  the percentage result is 0  How do I calculate the percentage correctly in Python

User · Answer

marks   raw input  Enter your Obtain marks    outof   raw input  Enter Out of marks    marks   int marks  outof   int outof  per   marks 100 outof print  Your Percentage is   str per    Note   raw input   function is used to take input from console and its return string formatted value  So we need to convert into integer otherwise it give error of conversion

User · Answer

I guess you re learning how to Python  The other answers are right  But I am going to answer your main question   how to calculate percentage in python    Although it works the way you did it  it doesn  t look very pythonic  Also  what happens if you need to add a new subject  You ll have to add another variable  use another input  etc  I guess you want the average of all marks  so you will also have to modify the count of the subjects everytime you add a new one  Seems a mess      I  ll throw a piece of code where the only thing you ll have to do is to add the name of the new subject in a list  If you try to understand this simple piece of code  your Python coding skills will experiment a little bump      usr local bin python2 7  marks       a dictionary  it s a list of  key   value  pairs  eg   Maths    34  subjects     Tamil   English   Maths   Science   Social     this is a list   here we populate the dictionary with the marks for every subject for subject in subjects     marks subject    input  Enter the     subject     marks       and finally the calculation of the total and the average total   sum marks itervalues    average   float total    len marks   print   The total is     str total      and the average is     str average     Here you can test the code and experiment with it

User · Answer

You re performing an integer division  Append a  0 to the number literals   per float tota   100 0 500 0    In Python 2 7 the division 100 500  0   As pointed out by  unwind  the float   call is superfluous since a multiplication division by a float returns a float   per  tota 100 0   500

User · Answer

This is because  100 500  is an integer expression yielding 0   Try  per   100 0   tota   500   there s no need for the float   call  since using a floating-point literal  100 0  will make the entire expression floating-point anyway

User · Answer

def percentage match mainvalue comparevalue       if mainvalue  gt   comparevalue          matched less   mainvalue - comparevalue         no percentage matched   100 - matched less 100 0 mainvalue         no percentage matched   str no percentage matched                 return no percentage matched      else          print  please checkout your value    print percentage match 100 10  Ans   10 0

User · Answer

I know I am late  but if you want to know the easiest way  you could do a code like this   number   100 right questions   1 control   100 c   control   number cc   right questions   c print float cc    You can change up the number score  and right questions  It will tell you the percent

User · Answer

Percent calculation that worked for me    new num - old num    old num   100 0

[python] how to calculate percentage in python

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