implement isProperFraction function to validate proper fractions

Author: rahanasuleiman8-ship-it

implement-and-rewrite-tests/implement/2-is-proper-fraction.js

@@ -14,5 +14,9 @@
 // execute the code to ensure all tests pass.
 
 export function isProperFraction(numerator, denominator) {
-  // TODO: Implement this function
+  if (denominator === 0) {
+    return false;
+  }
+
+  return Math.abs(numerator) < Math.abs(denominator);
 }