Are parentheses needed in the percentage grade formula? If so, rewrite the assignment to percentageGrade, adding parentheses where necessary

// This program determines the percentage grade on

// an exam, given the number of questions missed,

// how many points each question was worth,

// and the total points possible.



#include 

using namespace std;



int main()

{

int		pointsPerQuestion;

int		numberMissed;

double	percentageGrade;

double	pointsPossible;



cout << "Enter the total points possible on the exam => ";

cin  >> pointsPossible;

cout << endl;

cout << "Enter the number of points per question => ";

cin  >> pointsPerQuestion;

cout << endl 

cout <<"Enter the number of questions missed => ";

cin >> numberMissed;



percentageGrade = pointsPossible - numberMissed * pointsPerQuestion  /   					pointsPossible  *  100;



cout << endl << "The percentage grade is ";

cout << percentageGrade << "%";



return 0;

}

---

percentageGrade = ( pointsPossible - numberMissed * pointsPerQuestion )  /   					pointsPossible  *  100;