Reduce the fraction to its lowest form in C++

Given two integers Num1 and Num2 as input. The integers can be represented as fraction Num1/Num2. The goal is to reduce this fraction to its lowest form.

Using GCD to find highest denominator

• We will calculate the greatest common divisor of both numbers.

• Divide both numbers by that gcd

• Set both variables as quotient after division.

• Lowest fraction will be Num1/Num2.

Examples

Input − Num1=22 Num2=10

Output − Num1 = 11 Num2 = 5

Lowest Fraction : 11/5

Explanation− GCD of 22 and 10 is 2.

22/2=11 and 10/2=5

Lowest fraction is 11/5

Input− Num1=36 Num2=40

Output− Num1 = 9 Num2 = 10

Lowest Fraction : 9/10

Explanation − GCD of 36 and 40 is 4.

40/4=10 and 36/4=9

Lowest fraction is 9/10

Approach used in the below program is as follows

In this approach we will first calculate the GCD of input numbers using a recursive approach. Divide both numbers by GCD and obtain quotients. These quotients will be part of the lowest fraction.

• Take the input variables Num1 and Num2.

• Function findGCD(int a, int b) takes num1 and num2 and returns the gcd of both.

• If b is 0 return a else return findGCD(b,a%b).

• Function lowestFraction(int num1, int num2) takes both numbers as input and prints the lowest fraction.

• Take variable denom for gcd.

• Set num1=num1/denom and num2=num2/denom.

• Print num1 and num2.

• Print the lowest fraction as num1/num2.

Example

#include <bits/stdc++.h> using namespace std; int findGCD(int a, int b) {    if (b == 0)       return a;       return findGCD(b, a % b);    }    void lowestFraction(int num1, int num2){       int denom;       denom = findGCD(num1,num2);       num1/=denom;       num2/=denom;       cout<< "Num1 = " << num1<<endl;       cout<< "Num2 = " << num2<<endl;       cout<< "Lowest Fraction : "<<num1<<"/"<<num2; } int main(){    int Num1 = 14;    int Num2 = 8;    lowestFraction(Num1,Num2);    return 0; }

Output

If we run the above code it will generate the following Output

Num1 = 7 Num2 = 4 Lowest Fraction : 7/4