Refactor isProperFraction for simplicity

Simplified the isProperFraction function to return the comparison directly.

Author: vmoratti

Sprint-3/1-implement-and-rewrite-tests/implement/2-is-proper-fraction.js

@@ -11,11 +11,7 @@
 // execute the code to ensure all tests pass.
 
 function isProperFraction(numerator, denominator) {
-  if (Math.abs(numerator / denominator) < 1) {
-      return true;// if numerator is smaller than denominator - return true
-  } else {
-  return false;//return false if numerator if bigger that denominator
-  }
+      return (Math.abs(numerator / denominator) < 1);
 }
 
 
@@ -44,4 +40,4 @@ assertEquals(isProperFraction(2, 3), true);
 assertEquals(isProperFraction(4, 2), false);
 
 // Example: 4/4 is not a proper fraction
-assertEquals(isProperFraction(4, 4), false);
+assertEquals(isProperFraction(4, 4), false);