ok well i through this together for yeah. i hope this is what you ment of not then just yell at me. i dont know if it is the lack of sleep on my part but i dont think you explaned your problem very well. so i tried. here yeah go.
Code:
#include <iostream>
using namespace std;
int main(){
double firstNumber=0;
double secondNumber=0;
double percentage=0;
cout<<"ok you must enter two numbers...(if i understand this kid right lol.) the first being the number out of whatever. like 45 out of 100 for example.\n"<<endl;
cin>>firstNumber;
cout<<"\n ok now enter the second number(the on that the first will be out of)\n"<<endl;
cin>>secondNumber;
percentage = (firstNumber / secondNumber) * 100;
cout<<"so your percentage would be ... "<<percentage<<" %"<<endl;
}