implement divide static and instance method

src/main/java/Rational/Rational.java

@@ -83,19 +83,24 @@ public class Rational {
         return r1.multiply(r2);
     }
 
-    // TODO: Instance method - this / other
+    // COMPLETED - Instance method - this / other
-    // Formula: (a/b) ÷ (c/d) = (a*d) / (b*c)
     public Rational divide(Rational other) {
-        // YOUR CODE HERE
+        if (other.numerator == 0) {
-        // HINT: Division is multiplication by reciprocal
+            return null;
-        // Don't forget to check if other.numerator is zero!
+        }
-        return null; // Remove this line when implemented
+
+        int newNumerator = this.numerator * other.denominator;
+        int newDenominator = this.denominator * other.numerator;
+
+        Rational result = new Rational(newNumerator, newDenominator);
+        result.simplify();
+
+        return result;
     }
 
-    // TODO: Static method - r1 / r2
+    // COMPLETED - Static method - r1 / r2
     public static Rational divide(Rational r1, Rational r2) {
-        // YOUR CODE HERE
+        return r1.divide(r2);
-        return null; // Remove this line when implemented
     }
 
     //  PROVIDED - String representation