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# Math calculation of percentage

how to math calculation of percentage? such as: 30 % 4 or 369% 35.

13 Answers

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I mean % in javascript. what does it mean in js?

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modulo operator means?explain it?

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it means division operator. right! thanks jaya and visph

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you mean in programming?
In JavaScript :
var a=30;
var b=4;
document.write(a%b) ;
Output: 2
If not, Please provide your problem description clearly..

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Math percentages and programming operator % aren't related at all...
In computer context, x % y means remainder of the integer division of x by y (named 'modulo' in both math and computer fields).
In math context, x% of y means x hundredths of y, in other words:
value = float(input())
rate = float(input())
percent = value*rate/100
print(str(rate)+'% of',value,'equals',percent)

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in js that's the modulo operator ^^

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That's already said in my first post...

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It's called modular operator.. Gives you reminder of calculation (a%b) in dividend(a) divided by divisor(b).
I included already a example in my first post, see it again..

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Shadman Sakib
Division operator is / returns quotiont.
a=30,b=4
document.write(a/b); this prints 7
Modula operator is % returns reminder.
document.write(a%b); this prints 2
A slight difference is calling in programming language.

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Iyad Ahmed that was not my question.Though thanks for your comment. ☺

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thanks all for the help ☺

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30% is just 30/100
use that instead when doing calculations then multiply by hundred in the end

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Shadman Sakib
ok it seems you say an expression like 3 % 4
this means the modulo operator as other people answered
https://www.computerhope.com/jargon/m/modulo.htm