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Program to find the Discount Percentage

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Given Marked Price M                and Selling price as S                of a product. The task is to calculate the Discount Percentage applied to that product.


Examples:  

Input: M = 120, S = 100
Output: 16.66%

Input: M = 1000, S = 500
Output: 50% 


The mathematical formula to calculate the Discount Percentage for the product is: 

Discount = Marked Price - Selling price

Therefore,
Discount Percentage = (Discount / Marked Price) * 100


Below is the program to find the discount percentage for a product:  

C++

// CPP Program to find the Discount Percentage
 
#include <bits/stdc++.h>
using namespace std;
 
// Function to find the Discount Percentage
float discountPercentage(float S, float M)
{
    // Calculating discount
    float discount = M - S;
 
    // Calculating discount percentage
    float disPercent = (discount / M) * 100;
 
    return disPercent;
}
 
// Driver code
int main()
{
    int M, S;
    M = 120;
    S = 100;
     
    // Setting the precision to 2 decimals
    cout << std::fixed << std::setprecision(2)
        << discountPercentage(S, M) << "%" << endl;
 
    M = 1000;
    S = 500;
     
    // Setting the precision to 2 decimals
    cout << std::fixed << std::setprecision(2)
        << discountPercentage(S, M) << "%" << endl;
 
    return 0;
}

                    

Java

// Java Program to find the Discount Percentage
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
class GFG{
  
// Function to find the Discount Percentage
static float discountPercentage(float S, float M)
{
    // Calculating discount
    float discount = M - S;
  
    // Calculating discount percentage
    float disPercent = (discount / M) * 100;
  
    return disPercent;
}
  
// Driver code
public static void main(String args[])
{
    int M, S;
    M = 120;
    S = 100;
 
    System.out.printf("%.2f",discountPercentage(S,M));
    System.out.println("%");
     
  
    M = 1000;
    S = 500;
 
   System.out.printf("%.2f",discountPercentage(S,M));
    System.out.println("%");
}
}

                    

Python3

# Python3 Program to find the
# Discount Percentage
 
# Function to find the
# Discount Percentage
def discountPercentage(S, M):
 
    # Calculating discount
    discount = M - S
 
    # Calculating discount percentage
    disPercent = (discount /M) * 100
 
    return disPercent
 
 
# Driver code
if __name__=='__main__':
    M = 120
    S = 100
 
    print(discountPercentage(S, M), "%")
 
    M = 1000
    S = 500
 
    print(discountPercentage(S, M), "%")
 
# This code is contributed
# by ihritik

                    

C#

// C# Program to find the
// Discount Percentage
using System;
 
class GFG
{
 
// Function to find the
// Discount Percentage
static float discountPercentage(float S,
                                float M)
{
    // Calculating discount
    float discount = M - S;
 
    // Calculating discount percentage
    float disPercent = (discount / M) * 100;
 
    return disPercent;
}
 
// Driver code
static public void Main ()
{
    int M, S;
    M = 120;
    S = 100;
 
    Console.Write(discountPercentage(S, M));
    Console.WriteLine("%");
     
    M = 1000;
    S = 500;
 
    Console.Write(discountPercentage(S, M));
    Console.Write("%");
}
}
 
// This code is contributed by Raj

                    

PHP

<?php
// PHP Program to find the
// Discount Percentage
 
// Function to find the
// Discount Percentage
function discountPercentage($S, $M)
{
    // Calculating discount
    $discount = $M - $S;
 
    // Calculating discount percentage
    $disPercent = ($discount /$M) * 100;
 
    return $disPercent;
}
 
// Driver code
$M; $S;
$M = 120;
$S = 100;
 
echo discountPercentage($S, $M), "%", "\n";
 
$M = 1000;
$S = 500;
 
echo discountPercentage($S, $M), "%", "\n";
 
// This code is contribute
// by inder_verma
?>

                    

Javascript

<script>
 
// Java Script Program to find the Discount Percentage
 
 
  
// Function to find the Discount Percentage
function discountPercentage( S,  M)
{
    // Calculating discount
    let discount = M - S;
  
    // Calculating discount percentage
    let disPercent = (discount / M) * 100;
  
    return disPercent;
}
  
// Driver code
 let M, S;
    M = 120;
    S = 100;
 
    document.write(discountPercentage(S,M).toFixed(2));
    document.write("%");
    document.write("<br>");
  
    M = 1000;
    S = 500;
 
    document.write(discountPercentage(S,M).toFixed(2));
    document.write("%");
 
// Contributed by sravan kumar
</script>

                    

Output: 
16.67%
50.00%

 

Time Complexity: O(1), since there is no loop or recursion.
Auxiliary Space: O(1), since no extra space has been taken.

Approach#2: Using division formula

Algorithm

1. Divide the selling price (S) by the marked price (M) to get the fraction.
2. Subtract the fraction from 1 to get the discount fraction.
3. Multiply the discount fraction by 100 to get the discount percentage.
4. Return the discount percentage.

C++

#include <bits/stdc++.h>
using namespace std;
 
// Function to calculate the discount percentage
string discount_percentage(double M, double S) {
    double fraction = S / M;
    double discount_fraction = 1 - fraction;
    double percentage = discount_fraction * 100;
    stringstream stream;
    stream << fixed << setprecision(2) << percentage;
    return stream.str() + "%";
}
 
int main() {
    double M = 120;
    double S = 100;
    cout << discount_percentage(M, S) << endl;
    return 0;
}

                    

Java

import java.text.DecimalFormat;
 
public class Main {
    public static String discountPercentage(double M,
                                            double S)
    {
        double fraction = S / M;
        double discountFraction = 1 - fraction;
        double percentage = discountFraction * 100;
        DecimalFormat df = new DecimalFormat("0.00");
        return df.format(percentage) + "%";
    }
 
    public static void main(String[] args)
    {
        double M = 120;
        double S = 100;
        System.out.println(discountPercentage(M, S));
    }
}
 
// This code is contributed by Prajwal Kandekar

                    

Python3

def discount_percentage(M, S):
    fraction = S / M
    discount_fraction = 1 - fraction
    percentage = discount_fraction * 100
    return f"{percentage:.2f}%"
 
M = 120
S = 100
print(discount_percentage(M, S))

                    

C#

// C# code addition
 
using System;
 
class MainClass {
    public static string DiscountPercentage(double M, double S) {
        double fraction = S / M;
        double discountFraction = 1 - fraction;
        double percentage = discountFraction * 100;
        return $"{percentage:F2}%";
    }
 
    public static void Main(string[] args) {
        double M = 120;
        double S = 100;
        Console.WriteLine(DiscountPercentage(M, S));
    }
}
 
// The code  is contributed by Arushi Goel.

                    

Javascript

function discount_percentage(M, S) {
    let fraction = S / M;
    let discount_fraction = 1 - fraction;
    let percentage = discount_fraction * 100;
    return percentage.toFixed(2) + "%";
}
 
let M = 120;
let S = 100;
console.log(discount_percentage(M, S));

                    

Output
16.67%

Time Complexity: O(1)
Space Complexity: O(1)



Last Updated : 18 Apr, 2023
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