Implement isProperFraction to handle proper, improper, and negative fractions

Author: HoussamLh

Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.js

@@ -1,6 +1,15 @@
+// Explanation:
+// It checks if the absolute value of the numerator 
+// is less than the absolute value of the denominator.
+
+
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
-    // add your completed function from key-implement here
+  if (denominator === 0) {
+    throw new Error("Denominator cannot be zero");
+  }
+
+  return Math.abs(numerator) < Math.abs(denominator);
 }
 
-module.exports = isProperFraction;
+module.exports = isProperFraction;
+