# Program to calculate GST from original and net prices

Last Updated : 20 Feb, 2023

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%`

Time Complexity: O(1)

Auxiliary Space: O(1)

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