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# Program to calculate GST from original and net prices

• Difficulty Level : Basic
• Last Updated : 01 Apr, 2021

Given Original cost and Net price then calculate the percentage of GST
Examples:

```Input : Netprice = 120, original_cost = 100
Output : GST = 20%

Input : Netprice = 105, original_cost = 100
Output : GST = 5%```

How to calculate GST
GST ( Goods and Services Tax ) which is included in netprice of product for get GST % first need to calculate GST Amount by subtract original cost from Netprice and then apply
GST % formula = (GST_Amount*100) / original_cost
Netprice = original_cost + GST_Amount
GST_Amount = Netprice – original_cost
GST_Percentage = (GST_Amount * 100)/ original_cost

## C++

 `// CPP Program to compute GST from original``// and net prices.``#include ``using` `namespace` `std;` `float` `Calculate_GST(``float` `org_cost, ``float` `N_price)``{``    ``// return value after calculate GST%``    ``return` `(((N_price - org_cost) * 100) / org_cost);``}``// Driver program to test above functions``int` `main()``{``    ``float` `org_cost = 100;``    ``float` `N_price = 120;``    ``cout << ``"GST = "``         ``<< Calculate_GST(org_cost, N_price)``         ``<< ``" % "``;``    ``return` `0;``}`

## Java

 `// Java Program to compute GST``// from original and net prices.``import` `java.io.*;` `class` `GFG``{``    ``static` `float` `Calculate_GST(``float` `org_cost,``                                  ``float` `N_price)``    ``{``        ``// return value after calculate GST%``        ``return` `(((N_price - org_cost) * ``100``)``                 ``/ org_cost);``    ``}``    ` `    ``// Driver code``    ``public` `static` `void` `main (String[] args)``    ``{``         ``float` `org_cost = ``100``;``        ``float` `N_price = ``120``;``        ``System.out.print(``" GST = "`  `+ Calculate_GST``                         ``(org_cost, N_price) + ``"%"``);``    ``}``}` `// This code is contributed``// by vt_m.`

## Python3

 `# Python3 Program to``# compute GST from original``# and net prices.` `def` `Calculate_GST(org_cost, N_price):` `    ``# return value after calculate GST%``    ``return` `(((N_price ``-` `org_cost) ``*` `100``) ``/` `org_cost);` `# Driver program to test above functions``org_cost ``=` `100``N_price ``=` `120``print``(``"GST = "``,end``=``'')` `print``(``round``(Calculate_GST(org_cost, N_price)),end``=``'')` `print``(``"%"``)` `# This code is contributed``# by Smitha Dinesh Semwal`

## C#

 `// C# Program to compute GST``// from original and net prices.``using` `System;` `class` `GFG``{``    ``static` `float` `Calculate_GST(``float` `org_cost,``                                ``float` `N_price)``    ``{``        ``// return value after calculate GST%``        ``return` `(((N_price - org_cost) * 100)``                ``/ org_cost);``    ``}``    ` `    ``// Driver code``    ``public` `static` `void` `Main ()``    ``{``        ``float` `org_cost = 100;``        ``float` `N_price = 120;``        ``Console.Write(``" GST = "` `+ Calculate_GST``                        ``(org_cost, N_price) + ``"%"``);``    ``}``}` `// This code is contributed``// by vt_m.`

## PHP

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## Javascript

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Output:

`GST = 20%`

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