how to display percent sign in printf statement in c

1#include <stdio.h>
2#include <stdlib.h>
3
4int main(void)
5{
6 int num1 
7 int num2
8 int sum 
9 
10 printf("Enter your first number/n");
11 scanf("%d", num1);
12 
13 print("Enter your second number/n");
14 scanf("%d", num2);
15 
16 printf("The sum is %d", sum = num1 + num2);
17 
18 return 0;
19 }