started assignment and added programs

programs/p25/main.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+
+int main(void) {
+    int a, b;
+
+    printf("Integer a: ");
+    scanf("%d", &a);
+    printf("Integer b: ");
+    scanf("%d", &b);
+
+    printf("Value of a is %f%% of b.\n", (double)a / (double)b * 100.0);
+
+    return 0;
+}