Fix redeclaration error in convertToPercentage function and update comments for clarity

Author: Monsur0001

Sprint-3/1-key-errors/1.js

@@ -2,7 +2,13 @@
 
 // Why will an error occur when this program runs?
 // =============> write your prediction here
-
+ //An error will occur because the variable "decimalNumber"
+ //is being declared twice in the same scope. 
+ //The parameter "decimalNumber" is already defined as a 
+ //function argument, and then it is being redeclared 
+ //with "const decimalNumber = 0.5;". This causes a 
+ //syntax error because we cannot declare a variable 
+ //with the same name in the same scope.
 // Try playing computer with the example to work out what is going on
 
 function convertToPercentage(decimalNumber) {
@@ -16,5 +22,20 @@ console.log(decimalNumber);
 
 // =============> write your explanation here
 
+//The error occurs because the variable "decimalNumber" is being 
+//declared twice in the same scope. The parameter "decimalNumber" 
+//is already defined as a function argument, and then it is being 
+//redeclared with "const decimalNumber = 0.5;". This causes a 
+//syntax error because we cannot declare a variable with the 
+//same name in the same scope. To fix this, we can either rename 
+//the parameter or the variable inside the function.
+
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+function convertToPercentage(decimalNumber) {
+  const percentage = `${decimalNumber * 100}%`;
+
+  return percentage;
+}
+
+console.log(convertToPercentage(0.5));