C :

#include <stdio.h>
int main()
{double res;
res = (9.5*4.5-2.5*3)/(45.5-3.5);
	printf("%.2f",res);
return 0;
}

C++ :

#include<iostream>
using namespace std;

int main()
{
	cout.precision(2);
	cout << (9.5*4.5 - 2.5 * 3) / (45.5 - 3.5) << endl;
	getchar();
	return 0;
}

Java :

import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		double a=(9.5*4.5-2.5*3)/(45.5-3.5);
		a=Math.round(a*100);
		System.out.print(a/100);
	}
}

Python :

a = ((9.5*4.5)-(2.5*3))/(45.5-3.5)
print ('%.2f' % a)