'how to calculate percentage in python

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?

Solution 1:^[1]

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

Solution 2:^[2]

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.

Solution 3:^[3]

Percent calculation that worked for me:

(new_num - old_num) / old_num * 100.0

Solution 4:^[4]

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.

Solution 5:^[5]

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.

Solution 6:^[6]

def percentage_match(mainvalue,comparevalue):
    if mainvalue >= 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 %

Solution 7:^[7]

#Just begining my coding career with Python #here's what i wrote its simple

print("\nEnter your marks to calculate percentage")
a=float(input("\nEnter your English marks"))
b=float(input("\nEnter your Mathematics marks"))
c=float(input("\nEnter your Science marks"))
d=float(input("\nEnter your Computer Science marks"))
e=float(input("\nEnter your History marks"))
tot=a+b+c+d+e
print("\nTotal marks obtained",tot)
per=float(tot/500)*100
print("Percentage",per)

Solution 8:^[8]

You can try the below function using part == total marks out of whole == 500.

def percentage(part, whole):
try:
    if part == 0:
        percentage = 0
    else:
        percentage = 100 * float(part) / float(whole)
    return "{:.0f}".format(percentage)
except Exception as e:
    percentage = 100
    return "{:.0f}".format(percentage)

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1
Solution 2
Solution 3	sridhar
Solution 4	DigitalGeek
Solution 5	Mr. Code
Solution 6	Yash Shukla
Solution 7	Azam Siddiqui
Solution 8	Wasim Shaikh

'how to calculate percentage in python

Solution 1:[1]

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