**Write a C program to calculate profit or loss percentage.**

int main() {

float sp, cp, profit, loss, gpercent, lpercent;

/* get the cost price and selling price from user */

printf("Enter the cost price:");

scanf("%f", &cp);

printf("Enter the selling price:");

scanf("%f", &sp);

/* if sp == cp, no profit */

if (sp - cp == 0) {

printf("Profit & gain percent is 0!!\n");

} else if ((sp - cp) > 0) {

/* sp > cp - profit and profit percentage calculation */

profit = sp - cp;

gpercent = (profit * 100) / cp;

printf("Profit = %.2f Rupees\n", profit);

printf("Gain percentage = %.2f percent\n", gpercent);

} else {

/* cp > sp - loss and loss percentage calculation */

loss = cp - sp;

lpercent = (loss * 100) / cp;

printf("Loss = %.2f Rupees\n", loss);

printf("Loss Percentage = %.2f percent\n", lpercent);

}

return 0;

}

**Output:**

jp@jp-VirtualBox:~/$ ./a.out

Enter the cost price:100

Enter the selling price:128

Profit = 28.00 Rupees

Gain percentage = 28.00 percent

Enter the cost price:100

Enter the selling price:128

Profit = 28.00 Rupees

Gain percentage = 28.00 percent

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